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Naimi HM, Tristan A, Bes M, Vandenesch F, Nazari QA, Laurent F, Dupieux C. Molecular characterization and antimicrobial resistance of nasal Staphylococcus aureus in the community of Kabul. J Glob Antimicrob Resist 2023; 34:18-22. [PMID: 37321392 DOI: 10.1016/j.jgar.2023.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 03/24/2023] [Accepted: 06/04/2023] [Indexed: 06/17/2023] Open
Abstract
OBJECTIVES This study aimed to investigate the prevalence and molecular characteristics of community methicillin-resistant Staphylococcus aureus (MRSA) nasal carriage among students at Kabul University. METHODS Nasal swabs were collected from anterior nares of 150 healthy non-medical students at Kabul University. Antimicrobial susceptibility testing was performed on all S. aureus isolates, and all detected MRSA isolates were then confirmed by mecA/mecC polymerase chain reaction and characterized using DNA microarray. RESULTS A total of 50 S. aureus strains were isolated from the anterior nares of the 150 participants. The prevalence of S. aureus and MRSA nasal carriage among Kabul students was 33.3% and 12.7%, respectively. Seven (36.8%) MRSA isolates and 8 (25.8%) methicillin-susceptible S. aureus (MSSA) isolates were multidrug-resistant (i.e. resistant to at least three different antimicrobials tested). All MRSA isolates (n = 19) were susceptible to linezolid, rifampicin, and fusidic acid. Seven MRSA clones, belonging to four clonal complexes (CCs), were identified. The most commonly identified clone was CC22-MRSA-IV TSST-1-positive, which accounted for 63.2% (12/19) of MRSA isolates. SCCmec typing showed that most MRSA strains harboured SCCmec type IV (94.7%). Thirteen (68.4%) MRSA isolates carried the TSST-1 and 5 (26.3%) PVL genes. CONCLUSION Our findings revealed the relatively high prevalence of MRSA nasal carriers in the community in Kabul, with the predominance of the CC22-MRSA-IV TSST-1-positive clone and frequent multidrug resistance among these isolates.
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Affiliation(s)
- Haji Mohammad Naimi
- Department of Microbiology, Faculty of Pharmacy, Kabul University, Kabul, Afghanistan; CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France
| | - Anne Tristan
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Michèle Bes
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - François Vandenesch
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Qand Agha Nazari
- Department of Microbiology, Faculty of Pharmacy, Kabul University, Kabul, Afghanistan
| | - Frédéric Laurent
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Céline Dupieux
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.
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Munier C, Dupieux C, Kolenda C, Ranc AG, Dauwalder O, Bes M, Vandenesch F, Tristan A, Laurent F. Sensitivity of the PBP2a SA Culture Colony Test on shortly incubated subcultures of methicillin-resistant staphylococci from positive blood cultures. Diagn Microbiol Infect Dis 2023; 106:115917. [PMID: 36907018 DOI: 10.1016/j.diagmicrobio.2023.115917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 01/04/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023]
Abstract
The sensitivity of an immunochromatographic assay for detecting methicillin resistance (PBP2a SA Culture Colony Test, Alere-Abbott) on shortly incubated subcultures of staphylococci in blood cultures was evaluated. The assay is highly sensitive for the detection of methicillin-resistant Staphylococcus aureus after 4 hour-subculture but requires 6 hour-incubation for methicillin-resistant coagulase-negative staphylococci.
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Affiliation(s)
- Clément Munier
- Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France
| | - Céline Dupieux
- Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, Ecole Normale Supérieure de Lyon, Lyon, France.
| | - Camille Kolenda
- Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Anne-Gaelle Ranc
- Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Olivier Dauwalder
- Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Michèle Bes
- Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, Ecole Normale Supérieure de Lyon, Lyon, France
| | - François Vandenesch
- Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Anne Tristan
- Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Frédéric Laurent
- Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, Ecole Normale Supérieure de Lyon, Lyon, France
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Bourles A, Tristan A, Vandenesch F, Bes M, Laurent F, Ranc AG, Kainiu M, Gourinat AC, Biron A, Cazarola C, Goarant C, Colot J. A fusidic acid-resistant (PVL+) clone is associated with the increase in methicillin-resistant Staphylococcus aureus in New Caledonia. J Glob Antimicrob Resist 2022; 30:363-369. [PMID: 35835352 DOI: 10.1016/j.jgar.2022.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 04/04/2022] [Accepted: 07/01/2022] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES Since 2014, Staphylococcus aureus methicillin resistance is rapidly increasing in New Caledonia and is associated with potential serious clinical repercussions. In the present study, we investigated the epidemiology of Methicillin-Resistant S. aureus (MRSA) in New Caledonia and the possible emergence of a particular clonal strain. METHODS An overview of the distribution of MRSA in New Caledonia in 2019 is presented. We collected and analysed 171 clinical MRSA isolates from New Caledonia medical laboratories during August and September 2019. Among this collection, 49 representative isolates were analyzed by the French National Reference Center for Staphylococci using StaphyType DNA microarray allowing genetic characterization of the isolates. RESULTS Among the 1144 S. aureus isolated over the year 2019, 442 isolates (39%) were resistant to methicillin and 62% of these isolates were resistant to fusidic acid (FA). During the inclusion period, FA resistance rate was similar (60%). Genetic characterization evidenced CC6 as the predominant clonal complex (70%) with 26 isolates (53%) identified as CC6-MRSA-[IV+fus] (PVL+). CONCLUSIONS These findings demonstrated a low diversity of MRSA in New Caledonia with the dominance of a clonal complex not reported previously. The frequent fusidic acid (FA) resistance in MRSA was associated with a high prevalence of fusC, suggesting that FA misuse contributed to driving the selection of this clone. Our findings suggest the recommendation to stop the topical use of FA to control the emergence of this severe MRSA clone and decrease the rate of MRSA in New Caledonia.
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Key Words
- CC, Clonal complex
- CHN, Centre Hospitalier du Nord
- CHPF, Centre Hospitalier de la Polynésie Française
- CHT, Centre Hospitalier Territorial
- CWMH, Colonial War Memorial Hospital
- DASS-NC, Direction des Affaires Sanitaires et Sociales de Nouvelle-Calédonie
- EMRSA, Epidemic Methicillin-Resistant Staphylococcus aureus
- FA, Fusidic Acid
- HA-MRSA, Hospital-Acquired Methicillin-Resistant Staphylococcus aureus
- MIC, Minimum Inhibitory Concentration
- MRSA, Methicillin-Resistant Staphylococcus aureus
- MSSA, Methicillin-susceptible Staphylococcus aureus
- Methicillin-Resistant S. aureus, Fusidic acid resistance, New Caledonia, Panton Valentin Leukocidin, Community Acquired-MRSA Abbreviations CA-MRSA, Community-Acquired Methicillin-Resistant Staphylococcus aureus
- PBP2a, Penicillin-Binding Protein 2a
- PICTs, Pacific Island Countries and Territories
- PVL, Panton–Valentine Leukocidin
- SCCmec, Staphylococcal cassette chromosome mec
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Affiliation(s)
- Alexandre Bourles
- Institut Pasteur de Nouvelle-Calédonie, Institut Pasteur International Network, Medical and Environmental Bacteriology Group - Bacteriology Unit, Noumea, New Caledonia
| | - Anne Tristan
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - François Vandenesch
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Michèle Bes
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Frédéric Laurent
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Anne-Gaëlle Ranc
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Malia Kainiu
- Institut Pasteur de Nouvelle-Calédonie, Institut Pasteur International Network, Medical and Environmental Bacteriology Group - Bacteriology Unit, Noumea, New Caledonia
| | - Ann-Claire Gourinat
- Centre Hospitalier Territorial Gaston-Bourret, Laboratoire de Biologie Médicale, Dumbea-sur-mer, New Caledonia
| | - Antoine Biron
- Centre Hospitalier Territorial Gaston-Bourret, Laboratoire de Biologie Médicale, Dumbea-sur-mer, New Caledonia
| | - Cécile Cazarola
- Centre Hospitalier Territorial Gaston-Bourret, Laboratoire de Biologie Médicale, Dumbea-sur-mer, New Caledonia
| | - Cyrille Goarant
- Institut Pasteur de Nouvelle-Calédonie, Institut Pasteur International Network, Medical and Environmental Bacteriology Group - Bacteriology Unit, Noumea, New Caledonia
| | - Julien Colot
- Institut Pasteur de Nouvelle-Calédonie, Institut Pasteur International Network, Medical and Environmental Bacteriology Group - Bacteriology Unit, Noumea, New Caledonia; Centre Hospitalier Territorial Gaston-Bourret, Laboratoire de Biologie Médicale, Dumbea-sur-mer, New Caledonia.
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Gaillard T, Dupieux-Chabert C, Butin M, Dumitrescu O, Naceur O, Bouveyron C, Martra A, Bes M, Tristan A, Vandenesch F, Lina G, Laurent F, Rasigade JP. Heterogeneous vancomycin resistance in Staphylococcus aureus does not predict development of vancomycin resistance upon vancomycin pressure. J Antimicrob Chemother 2022; 77:1032-1035. [PMID: 35022718 DOI: 10.1093/jac/dkab488] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 12/09/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND It is unclear whether Staphylococcus aureus with heterogeneous intermediate vancomycin resistance (hVISA) can develop vancomycin resistance faster than vancomycin-susceptible S. aureus (VSSA) strains. METHODS We compared the kinetics of vancomycin MIC increase for 15 days of sustained in vitro vancomycin exposure for clinical hVISA (n = 12) and VSSA (n = 24) isolates, as well as for reference strains Mu3 (hVISA) and ATCC 29213 (VSSA). Clinical isolates were categorized as hVISA using the population analysis profile method. MICs were monitored for 15 days and the rate of MIC increase under exposure, for each strain, was evaluated in a linear regression model relative to time. RESULTS All isolates acquired vancomycin resistance upon exposure. Vancomycin MICs increased faster for VSSA compared with hVISA isolates (P < 0.01). CONCLUSIONS The hVISA phenotype does not correspond to an enhanced adaptation potential to in vitro vancomycin pressure.
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Affiliation(s)
- Tiphaine Gaillard
- Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Céline Dupieux-Chabert
- Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Marine Butin
- Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Oana Dumitrescu
- Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Oilida Naceur
- Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Caroline Bouveyron
- Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Annie Martra
- Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Michèle Bes
- Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Anne Tristan
- Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - François Vandenesch
- Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Gérard Lina
- Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Frédéric Laurent
- Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Jean-Philippe Rasigade
- Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
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5
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Côrtes MF, Botelho AMN, Bandeira PT, Mouton W, Badiou C, Bes M, Lima NCB, Soares AER, Souza RC, Almeida LGP, Martins-Simoes P, Vasconcelos ATR, Nicolás MF, Laurent F, Planet PJ, Figueiredo AMS. Reductive evolution of virulence repertoire to drive the divergence between community- and hospital-associated methicillin-resistant Staphylococcus aureus of the ST1 lineage. Virulence 2021; 12:951-967. [PMID: 33734031 PMCID: PMC7993186 DOI: 10.1080/21505594.2021.1899616] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 01/26/2021] [Accepted: 03/01/2021] [Indexed: 01/01/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) of the ST1-SCCmecIV lineage has been associated with community-acquired (CA) infections in North America and Australia. In Brazil, multi-drug resistant ST1-SCCmecIV MRSA has emerged in hospital-associated (HA) diseases in Rio de Janeiro. To understand these epidemiological differences, genomic and phylogenetic analyses were performed. In addition, virulence assays were done for representative CA - and HA-MRSA strains. Despite the conservation of the virulence repertoire, some genes were missing in Brazilian ST1-SCCmecIV including lukSF-PV, fnbB, and several superantigen-encoded genes. Additionally, CA-MRSA lost the splDE while HA-MRSA strains conserved the complete operon. Most of these variable genes were located in mobile genetic elements (MGE). However, conservation and maintenance of MGEs were often observed despite the absence of their associated virulence markers. A Bayesian phylogenetic tree revealed the occurrence of more than one entrance of ST1 strains in Rio de Janeiro. The tree shape and chronology allowed us to infer that the hospital-associated ST1-SCCmecIV from Brazil and the community-acquired USA400 from North America are not closely related and that they might have originated from different MSSA strains that independently acquired SCCmecIV cassettes. As expected, representatives of ST1 strains from Brazil showed lower cytotoxicity and a greater ability to survive inside human host cells. We suggest that Brazilian ST1-SCCmecIV strains have adapted to the hospital setting by reducing virulence and gaining the ability to persist and survive inside host cells. Possibly, these evolutionary strategies may balance the biologic cost of retaining multiple antibiotic resistance genes.
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Affiliation(s)
- Marina Farrel Côrtes
- Laboratório de Biologia Molecular de Bactérias, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
- Faculté de Médecine Lyon Est, Université de Lyon, Domaine de la Buire, Lyon, France
| | - Ana Maria N. Botelho
- Laboratório de Biologia Molecular de Bactérias, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Paula Terra Bandeira
- Laboratório de Biologia Molecular de Bactérias, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - William Mouton
- Centre International de Recherche en Infectiologie (CIRI)―team Pathogénie des Staphylococques―Université Lyon 1, École Normale Supérieure de Lyon, Lyon, France
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils De Lyon, Lyon, France
| | - Cedric Badiou
- Centre International de Recherche en Infectiologie (CIRI)―team Pathogénie des Staphylococques―Université Lyon 1, École Normale Supérieure de Lyon, Lyon, France
| | - Michèle Bes
- Centre International de Recherche en Infectiologie (CIRI)―team Pathogénie des Staphylococques―Université Lyon 1, École Normale Supérieure de Lyon, Lyon, France
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils De Lyon, Lyon, France
- Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Nord, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Nicholas C. B. Lima
- Laboratório Nacional de Computação Científica, Petrópolis, Rio de Janeiro, Brazil
| | | | - Rangel C. Souza
- Laboratório Nacional de Computação Científica, Petrópolis, Rio de Janeiro, Brazil
| | - Luiz G. P. Almeida
- Laboratório Nacional de Computação Científica, Petrópolis, Rio de Janeiro, Brazil
| | - Patricia Martins-Simoes
- Centre International de Recherche en Infectiologie (CIRI)―team Pathogénie des Staphylococques―Université Lyon 1, École Normale Supérieure de Lyon, Lyon, France
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils De Lyon, Lyon, France
- Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Nord, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | | | - Marisa F. Nicolás
- Laboratório Nacional de Computação Científica, Petrópolis, Rio de Janeiro, Brazil
| | - Frédéric Laurent
- Faculté de Médecine Lyon Est, Université de Lyon, Domaine de la Buire, Lyon, France
- Centre International de Recherche en Infectiologie (CIRI)―team Pathogénie des Staphylococques―Université Lyon 1, École Normale Supérieure de Lyon, Lyon, France
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, Hospices Civils De Lyon, Lyon, France
- Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Nord, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Paul J. Planet
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Sackler Institute of Comparative Genomics, American Museum of Natural History, New York, NY, USA
| | - Agnes M. S. Figueiredo
- Laboratório de Biologia Molecular de Bactérias, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
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6
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Earls MR, Steinig EJ, Monecke S, Samaniego Castruita JA, Simbeck A, Schneider-Brachert W, Vremerǎ T, Dorneanu OS, Loncaric I, Bes M, Lacoma A, Prat Aymerich C, Wernery U, Armengol-Porta M, Blomfeldt A, Duchene S, Bartels MD, Ehricht R, Coleman DC. Exploring the evolution and epidemiology of European CC1-MRSA-IV: tracking a multidrug-resistant community-associated meticillin-resistant Staphylococcus aureus clone. Microb Genom 2021; 7. [PMID: 34223815 PMCID: PMC8477393 DOI: 10.1099/mgen.0.000601] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
This study investigated the evolution and epidemiology of the community-associated and multidrug-resistant Staphylococcus aureus clone European CC1-MRSA-IV. Whole-genome sequences were obtained for 194 European CC1-MRSA-IV isolates (189 of human and 5 of animal origin) from 12 countries, and 10 meticillin-susceptible precursors (from North-Eastern Romania; all of human origin) of the clone. Phylogenetic analysis was performed using a maximum-likelihood approach, a time-measured phylogeny was reconstructed using Bayesian analysis, and in silico microarray genotyping was performed to identify resistance, virulence-associated and SCCmec (staphylococcal cassette chromosome mec) genes. Isolates were typically sequence type 1 (190/204) and spa type t127 (183/204). Bayesian analysis indicated that European CC1-MRSA-IV emerged in approximately 1995 before undergoing rapid expansion in the late 1990s and 2000s, while spreading throughout Europe and into the Middle East. Phylogenetic analysis revealed an unstructured meticillin-resistant S. aureus (MRSA) population, lacking significant geographical or temporal clusters. The MRSA were genotypically multidrug-resistant, consistently encoded seh, and intermittently (34/194) encoded an undisrupted hlb gene with concomitant absence of the lysogenic phage-encoded genes sak and scn. All MRSA also harboured a characteristic ~5350 nt insertion in SCCmec adjacent to orfX. Detailed demographic data from Denmark showed that there, the clone is typically (25/35) found in the community, and often (10/35) among individuals with links to South-Eastern Europe. This study elucidated the evolution and epidemiology of European CC1-MRSA-IV, which emerged from a meticillin-susceptible lineage prevalent in North-Eastern Romania before disseminating rapidly throughout Europe.
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Affiliation(s)
- Megan R Earls
- Microbiology Research Unit, Division of Oral Biosciences, Dublin Dental University Hospital, Trinity College, University of Dublin, Dublin, Ireland
| | - Eike J Steinig
- Australian Institute of Tropical Health and Medicine, Townsville, Queensland, Australia
| | - Stefan Monecke
- Leibniz Institute of Photonic Technology (IPHT), Jena, Germany.,Institute for Medical Microbiology and Hygiene, Medical Faculty "Carl Gustav Carus", Technische Universität Dresden, Dresden, Germany.,InfectoGnostics Research Campus Jena, Jena, Germany
| | | | - Alexandra Simbeck
- Institute for Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Wulf Schneider-Brachert
- Institute for Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Teodora Vremerǎ
- Microbiology Unit, Department of Preventive and Interdisciplinary Medicine, University of Medicine and Pharmacy "Grigore T Popa", Iaşi, Romania
| | - Olivia S Dorneanu
- Microbiology Unit, Department of Preventive and Interdisciplinary Medicine, University of Medicine and Pharmacy "Grigore T Popa", Iaşi, Romania
| | - Igor Loncaric
- Institute of Microbiology, Department for Pathobiology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Michèle Bes
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Alicia Lacoma
- Microbiology Department, Hospital Universitari Germans Trias i Pujol, Institut d'Investigació Germans Trias i Pujol, CIBER Enfermedades Respiratorias, Universitat Autònoma de Barcelona, Badalona, Spain
| | - Cristina Prat Aymerich
- Microbiology Department, Hospital Universitari Germans Trias i Pujol, Institut d'Investigació Germans Trias i Pujol, CIBER Enfermedades Respiratorias, Universitat Autònoma de Barcelona, Badalona, Spain.,Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | | | | | - Anita Blomfeldt
- Department of Microbiology and Infection Control, Akershus University Hospital, Lørenskog, Norway
| | - Sebastian Duchene
- Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Mette D Bartels
- Department of Clinical Microbiology, Copenhagen University Hospital, Hvidovre, Denmark
| | - Ralf Ehricht
- Institute of Physical Chemistry, Friedrich-Schiller University, Jena, Germany.,Leibniz Institute of Photonic Technology (IPHT), Jena, Germany.,InfectoGnostics Research Campus Jena, Jena, Germany
| | - David C Coleman
- Microbiology Research Unit, Division of Oral Biosciences, Dublin Dental University Hospital, Trinity College, University of Dublin, Dublin, Ireland
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7
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Naimi HM, André C, Bes M, Tristan A, Gustave CA, Vandenesch F, Nazari QA, Laurent F, Dupieux C. Antibiotic resistance profile and molecular characterization of Staphylococcus aureus strains isolated in hospitals in Kabul, Afghanistan. Eur J Clin Microbiol Infect Dis 2021; 40:1029-1038. [PMID: 33389264 DOI: 10.1007/s10096-020-04130-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 12/14/2020] [Indexed: 11/24/2022]
Abstract
The aim of this study was to investigate the molecular features and the antibiotic resistance profile of 98 clinical Staphylococcus aureus isolates collected during 6 months in two hospitals of Kabul, Afghanistan. For all isolates, antimicrobial resistance patterns were determined by the disc diffusion method (including methicillin resistance which was detected using cefoxitin). The presence of the mecA/mecC genes was detected by PCR. Strains were then extensively characterized using microarray analysis. Of the 98 S. aureus isolates, methicillin-resistant S. aureus (MRSA) prevalence was high at 66.3%. Antibiotic susceptibility testing also revealed a high resistance rate to penicillin (100%), erythromycin (66.3%), ciprofloxacin (55.1%), and cotrimoxazole (40.8%). Resistance to tobramycin was detected in 25.5%, to gentamicin in 16.3%, to chloramphenicol in 34.7%, and to doxycycline in 23.5% of the isolates. All the MRSA isolates were mecA-positive and none of them harbored mecC. Isolates were grouped into twelve clonal complexes and twenty-seven distinct clones. The most frequently detected clones were the Southwest Pacific clone (CC30-MRSA-IV PVL+) (21/65 MRSA, 32.3%), the CC22-MRSA-IV TSST-1+ clone (11/65 MRSA, 16.9%), and the Bengal Bay clone (ST772-MRSA-V PVL+) (11/65 MRSA, 16.9%). The PVL genes were found in 59.2% (46/65 MRSA and 12/33 methicillin-susceptible S. aureus, MSSA) and tst1 gene in 16.3% of isolates. This molecular study highlights the high prevalence of MRSA and the large genetic diversity of the S. aureus isolates circulating and detected in two hospitals of Kabul, with the presence of multiple virulence and antibiotic resistance genes.
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Affiliation(s)
- Haji Mohammad Naimi
- Department of Microbiology, Faculty of Pharmacy, Kabul University, Kabul, Afghanistan.,CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France
| | - Camille André
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France.,Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, 103 Grande Rue de la Croix-Rousse, 69004, Lyon, France
| | - Michèle Bes
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.,Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, 103 Grande Rue de la Croix-Rousse, 69004, Lyon, France
| | - Anne Tristan
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.,Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, 103 Grande Rue de la Croix-Rousse, 69004, Lyon, France
| | - Claude-Alexandre Gustave
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.,Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, 103 Grande Rue de la Croix-Rousse, 69004, Lyon, France
| | - François Vandenesch
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.,Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, 103 Grande Rue de la Croix-Rousse, 69004, Lyon, France
| | - Qand Agha Nazari
- Department of Microbiology, Faculty of Pharmacy, Kabul University, Kabul, Afghanistan
| | - Frédéric Laurent
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.,Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, 103 Grande Rue de la Croix-Rousse, 69004, Lyon, France
| | - Céline Dupieux
- CIRI - Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France. .,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France. .,Laboratoire de Bactériologie, Institut des Agents Infectieux, Hôpital de la Croix-Rousse, 103 Grande Rue de la Croix-Rousse, 69004, Lyon, France.
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8
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Baude J, Bastien S, Gillet Y, Leblanc P, Itzek A, Tristan A, Bes M, Duguez S, Moreau K, Diep BA, Norrby-Teglund A, Henry T, Vandenesch F. Necrotizing Soft Tissue Infection Staphylococcus aureus but not S. pyogenes Isolates Display High Rates of Internalization and Cytotoxicity Toward Human Myoblasts. J Infect Dis 2020; 220:710-719. [PMID: 31001627 DOI: 10.1093/infdis/jiz167] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/08/2019] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Necrotizing soft tissue infections (NSTIs) caused by group A Streptococcus (GAS) and occasionally by Staphylococcus aureus (SA) frequently involve the deep fascia and often lead to muscle necrosis. METHODS To assess the pathogenicity of GAS and S. aureus for muscles in comparison to keratinocytes, adhesion and invasion of NSTI-GAS and NSTI-SA isolates were assessed in these cells. Bloodstream infections (BSI-SA) and noninvasive coagulase-negative staphylococci (CNS) isolates were used as controls. RESULTS NSTI-SA and BSI-SA exhibited stronger internalization into human keratinocytes and myoblasts than NSTI-GAS or CNS. S. aureus internalization reached over 30% in human myoblasts due to a higher percentage of infected myoblasts (>11%) as compared to keratinocytes (<3%). Higher cytotoxicity for myoblasts of NSTI-SA as compared to BSI-SA was attributed to higher levels of psmα and RNAIII transcripts in NSTI-SA. However, the 2 groups were not discriminated at the genomic level. The cellular basis of high internalization rate in myoblasts was attributed to higher expression of α5β1 integrin in myoblasts. Major contribution of FnbpAB-integrin α5β1 pathway to internalization was confirmed by isogenic mutants. CONCLUSIONS Our findings suggest a factor in NSTI-SA severity is the strong invasiveness of S. aureus in muscle cells, a property not shared by NSTI-GAS isolates.
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Affiliation(s)
- Jessica Baude
- Centre International de Recherche en Infectiologie, Université de Lyon; Inserm U1111; Ecole Normale Supérieure de Lyon; Université Lyon 1, CNRS, UMR5308; Lyon, France
| | - Sylvère Bastien
- Centre International de Recherche en Infectiologie, Université de Lyon; Inserm U1111; Ecole Normale Supérieure de Lyon; Université Lyon 1, CNRS, UMR5308; Lyon, France
| | - Yves Gillet
- Centre International de Recherche en Infectiologie, Université de Lyon; Inserm U1111; Ecole Normale Supérieure de Lyon; Université Lyon 1, CNRS, UMR5308; Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, France
| | - Pascal Leblanc
- NeuroMyoGene Institute, Université de Lyon, CNRS UMR5310, INSERM U1217, France
| | - Andreas Itzek
- Helmholtz-Zentrum für Infektionsforschung GmbH, Braunschweig, Germany
| | - Anne Tristan
- Centre International de Recherche en Infectiologie, Université de Lyon; Inserm U1111; Ecole Normale Supérieure de Lyon; Université Lyon 1, CNRS, UMR5308; Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, France
| | - Michèle Bes
- Centre International de Recherche en Infectiologie, Université de Lyon; Inserm U1111; Ecole Normale Supérieure de Lyon; Université Lyon 1, CNRS, UMR5308; Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, France
| | - Stephanie Duguez
- Northern Ireland Center for Stratified Medicine, Biomedical Sciences Research Institute, Londonderry, United Kingdom
| | - Karen Moreau
- Centre International de Recherche en Infectiologie, Université de Lyon; Inserm U1111; Ecole Normale Supérieure de Lyon; Université Lyon 1, CNRS, UMR5308; Lyon, France
| | - Binh An Diep
- Division of HIV, Infectious Diseases, and Global Medicine, Department of Medicine, University of California, San Francisco
| | - Anna Norrby-Teglund
- Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge, Sweden
| | - Thomas Henry
- Centre International de Recherche en Infectiologie, Université de Lyon; Inserm U1111; Ecole Normale Supérieure de Lyon; Université Lyon 1, CNRS, UMR5308; Lyon, France
| | - François Vandenesch
- Centre International de Recherche en Infectiologie, Université de Lyon; Inserm U1111; Ecole Normale Supérieure de Lyon; Université Lyon 1, CNRS, UMR5308; Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, France
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9
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Bartels MD, Worning P, Andersen LP, Bes M, Enger H, Ås CG, Hansen TA, Holzknecht BJ, Larssen KW, Laurent F, Mäkitalo B, Pichon B, Svartström O, Westh H. Repeated introduction and spread of the MRSA clone t304/ST6 in northern Europe. Clin Microbiol Infect 2020; 27:284.e1-284.e5. [PMID: 32439595 DOI: 10.1016/j.cmi.2020.05.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/13/2020] [Accepted: 05/03/2020] [Indexed: 12/21/2022]
Abstract
OBJECTIVES During the last decades several methicillin-resistant Staphylococcus aureus (MRSA) clones with the capability of global spread have emerged in the community. Here, we have investigated a large collection of clinical isolates belonging to MRSA clone t304/ST6, which has emerged in many European countries over the last years, in order to retrace its phylogeny and its spread. METHODS We characterized 466 ST6 isolates from Denmark (n = 354), France (n = 10), Norway (n = 24), Sweden (n = 27) and the UK (n = 51). All had spa-type t304 (n = 454) or t304-related spa-types (n = 12) and whole genome sequencing (WGS) was carried out on Illumina Miseq or Hiseq with 100-300 bp reads. cgMLST was performed using Ridom SeqSphere. RESULTS A minimum spanning tree (MST) of all 466 isolates showed one large cluster including 182 isolates collected only from Denmark and related to a long-term neonatal outbreak in Copenhagen. This cluster contrasted with numerous small clusters, including the remaining Danish isolates and isolates from the other countries that interspersed throughout the tree. Most isolates were Panton-Valentine leukocidin (PVL) negative (95%) and harboured SCCmec IVa. One genome was closed using Oxford Nanopore technology and Illumina MiSeq. It contained a plasmid of 19.769 bp including the blaZ gene. A similar plasmid was found in 78% of all isolates. DISCUSSION t304/ST6 is a successful emerging clone and the fact that isolates from five countries are interspersed throughout the MST indicates a common origin. This clone is commonly described in the Middle East and its emergence in Europe coincides with influx of refugees from the Syrian Civil War.
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Affiliation(s)
- M D Bartels
- Department of Clinical Microbiology, MRSA Knowledge Centre, Hvidovre Hospital, Denmark.
| | - P Worning
- Department of Clinical Microbiology, MRSA Knowledge Centre, Hvidovre Hospital, Denmark
| | - L P Andersen
- Department of Clinical Microbiology, Rigshospitalet, Denmark
| | - M Bes
- Institute for Infectious Agents - Department of Bacteriology, French National Reference Centre for Staphylococci, Lyon, France
| | - H Enger
- Norwegian MRSA Reference Laboratory, Department of Medical Microbiology, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - C G Ås
- Norwegian MRSA Reference Laboratory, Department of Medical Microbiology, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - T A Hansen
- Department of Clinical Microbiology, MRSA Knowledge Centre, Hvidovre Hospital, Denmark
| | - B J Holzknecht
- Department of Clinical Microbiology, Herlev Gentofte Hospital, Denmark
| | - K W Larssen
- Department of Medical Microbiology, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - F Laurent
- Institute for Infectious Agents - Department of Bacteriology, French National Reference Centre for Staphylococci, Lyon, France
| | - B Mäkitalo
- Public Health Agency of Sweden, Solna, Sweden
| | - B Pichon
- Public Health England, National Infection Service, London, UK
| | | | - H Westh
- Department of Clinical Microbiology, MRSA Knowledge Centre, Hvidovre Hospital, Denmark; Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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10
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Jacquemond I, Muggeo A, Lamblin G, Tristan A, Gillet Y, Bolze PA, Bes M, Gustave CA, Rasigade JP, Golfier F, Ferry T, Dubost A, Abrouk D, Barreto S, Prigent-Combaret C, Thioulouse J, Lina G, Muller D. Author Correction: Complex ecological interactions of Staphylococcus aureus in tampons during menstruation. Sci Rep 2020; 10:1848. [PMID: 32001730 PMCID: PMC6992739 DOI: 10.1038/s41598-020-57947-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Isaline Jacquemond
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France.,CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
| | - Anaëlle Muggeo
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
| | - Gery Lamblin
- Department of Gynecology, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France
| | - Anne Tristan
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Yves Gillet
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France.,Department of Pediatric Emergency, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France
| | - Pierre Adrien Bolze
- Department of Gynecological Surgery and Oncology, Obstetrics, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, Pierre Bénite, France
| | - Michèle Bes
- Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Claude Alexandre Gustave
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Jean-Philippe Rasigade
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - François Golfier
- Department of Gynecological Surgery and Oncology, Obstetrics, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, Pierre Bénite, France
| | - Tristan Ferry
- Service des maladies infectieuses et tropicales, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Audrey Dubost
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France
| | - Danis Abrouk
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France
| | - Samuel Barreto
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France.,Université Lyon 1, CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, Villeurbanne, France
| | - Claire Prigent-Combaret
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France
| | - Jean Thioulouse
- Université Lyon 1, CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, Villeurbanne, France
| | - Gérard Lina
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France. .,Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France.
| | - Daniel Muller
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France.
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11
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Durand G, Dupieux-Chabert C, Gustave CA, Bes M, Fruiquière B, Fulchiron C, Munoz L, Rivat S, Ranc AG, Vandenesch F, Laurent F, Tristan A, Martins-Simoes P. 608. Emerging Methicillin Resistance Mechanism in mec Gene-Negative Staphylococci not Detected by Reference Methods. Open Forum Infect Dis 2019. [PMCID: PMC6811016 DOI: 10.1093/ofid/ofz360.677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Background B-lactam resistance in Staphylococci is mediated by mec genes usually diagnosed by disc diffusion Cefoxitin test (DDFOX) and PCR testing. Here, we report methicillin-resistant Staphylococcus lugdunensis and Staphylococcus aureus strains lacking mec gene misdiagnosed by reference methods. Since the strains are not B-lactamase hyperproducers we investigated the molecular basis of the methicillin resistance. Methods We tested 2 S. lugdunensis isolates (SL1, SL2) collected from distinct blood cultures of the same patient and 2 S. aureus isolates (SA1, SA2): (i) by DDFOX, (ii) for Oxacillin MIC by agar dilution (AD), (iii) by VITEK®2 (bioMérieux) for Oxacillin MIC (V2 OXA) and Cefoxitin Screen Test (V2 OXSF), (iv) for mecA, B, C genes by PCR and (v) by whole-genome sequencing (WGS). Results The 4 isolates were methicillin susceptible by DD FOX and mec negative. However, all the isolates displayed variable results for V2 OXA MIC (0.5 to ≥4 mg/L) and for V2 OXSF (POSITIVE, NEGATIVE). For SL1 and SL2 isolates, the V2 OXSF growth curve atypical pattern has led to investigating the OXSF wells. The plates inoculated with the broth extracted from the OXSF well showed 2 colony morphotypes (small “P” and regular “G”) for both isolates. The small colonies (SL1P, SL2P) were Oxacillin resistant (V2 OXA MIC≥4; AD MIC = 4) and V2 OXSF POSITIVE whereas the regular colonies (SL1G, SL2G) were Oxacillin susceptible (V2 OXA MIC = 2; AD MIC = 0.5) and V2 OXSF NEGATIVE. The 4 morphotypes were cefoxitin susceptible by DDFOX and mec negative. Interestingly, WGS revealed a GdpP truncation in the N-terminal domain only found in S. lugdunensis small colonies (SL1P, SL2P) phenotypically resistant to Oxacillin. GdpP is a cyclic diadenosine monophosphate phosphodiesterase enzyme which function is the hydrolysis of a signaling nucleotide. Conclusion We described mec negative S. lugdunensis and S. aureus strains expressing heterogeneous methicillin resistance detected by the VITEK2 OXSF test. S. lugdunensis subpopulation of small colonies resistant to oxacillin is associated with a truncation of GdpP protein previously described in S. aureus. Interestingly GdpP loss of function in Staphylococci is associated with a reduced growth and may arise as a result of the selective pressure of exposure to B Lactams. Disclosures All authors: No reported disclosures.
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Affiliation(s)
| | | | | | - Michèle Bes
- French National Reference Center for Staphylococci, Lyon, Rhone-Alpes, France
| | | | | | - Lorette Munoz
- bioMérieux, La Balme Les Grottes, Rhone-Alpes, France
| | - Sarah Rivat
- bioMérieux, La Balme Les Grottes, Rhone-Alpes, France
| | - Anne-gaelle Ranc
- French National Reference Center for Staphylococci, Lyon, Rhone-Alpes, France
| | - Francois Vandenesch
- French National Reference Center for Staphylococci, Lyon, Rhone-Alpes, France
| | - Frederic Laurent
- French National Reference Center for Staphylococci, Lyon, Rhone-Alpes, France
| | - Anne Tristan
- French National Reference Center for Staphylococci, Lyon, Rhone-Alpes, France
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12
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Bietrix J, Kolenda C, Sapin A, Haenni M, Madec JY, Bes M, Dupieux C, Tasse J, Laurent F. Persistence and Diffusion of mecC-Positive CC130 MRSA Isolates in Dairy Farms in Meurthe-et-Moselle County (France). Front Microbiol 2019; 10:47. [PMID: 30761099 PMCID: PMC6363682 DOI: 10.3389/fmicb.2019.00047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/14/2019] [Indexed: 11/13/2022] Open
Abstract
Background: Methicillin resistance in Staphylococcus aureus (MRSA) is classically conferred by the acquisition of the mecA gene encoding an additional penicillin binding protein with low affinity for beta-lactams. A mecA variant, named mecC, was described in 2011. MRSA isolates harboring mecC of both animal and human origin have since been collected in different European countries. In France, animal cases were reported in 4 dairy farms between 2008 and 2013 in the Meurthe-et-Moselle county, all located in a 30 km perimeter, suggesting a possible dissemination of mecC-positive MRSA strains. We performed a prospective study to evaluate the local epidemiology of such strains in terms of (i) dissemination among animals, humans and in the environment, and (ii) persistence in Meurthe-et-Moselle dairy cattle farms. Methods: The 4 French dairy farms with previous reports of mecC-positive MRSA strains and 14 farms in the same perimeter were included in this study. In each farm, nasal swabs, rectal swabs and milk samples were collected from 10 randomly selected cows, as well as nasal samples from family pets, volunteer farmers and veterinarians. One farm (E0), in which mecC-MRSA isolates were detected, was selected to study more deeply the dissemination of mecC-positive strains within the farm. After pre-enrichment of swabs and milk, they were subcultured on MSSA/MRSA chromogenic selective agar plates. S. aureus colonies were tested with a multiplex PCR to detect the mecA and mecC genes. The mecC-positive strains were characterized using DNA microarray. Results: mecC-positive strains were recovered in four farms, corresponding to the ones with previous reports of mecC-positive MRSA strains, and originated only from dairy cow samples. The screening in the E0 farm showed that 22% of the dairy cows carried mecC-positive MRSA. Three strains were also isolated from the environmental samples. All mecC-positive strains belonged to the clonal complex CC130 and harbored the same spa-type t1736. Conclusion: This study found that mecC-positive MRSA isolates are able to persist within the same farms for several years after being introduced in this setting and are able to widely disseminate but only among dairy cows suggesting that milking machines might be a key player.
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Affiliation(s)
- Jacques Bietrix
- Cliniques Vétérinaires de l'Arche, Valence, France.,Pathogénie des Infections à Staphylocoque, Centre International de Recherche en Infectiologie, Lyon, France
| | - Camille Kolenda
- Pathogénie des Infections à Staphylocoque, Centre International de Recherche en Infectiologie, Lyon, France.,Institut des Agents Infectieux, Laboratoire de Bactériologie, Hospices Civils de Lyon, Lyon, France
| | - Anaïs Sapin
- Pathogénie des Infections à Staphylocoque, Centre International de Recherche en Infectiologie, Lyon, France
| | - Marisa Haenni
- Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail - Université de Lyon, Lyon, France
| | - Jean-Yves Madec
- Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail - Université de Lyon, Lyon, France
| | - Michèle Bes
- Pathogénie des Infections à Staphylocoque, Centre International de Recherche en Infectiologie, Lyon, France.,Institut des Agents Infectieux, Laboratoire de Bactériologie, Hospices Civils de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Céline Dupieux
- Pathogénie des Infections à Staphylocoque, Centre International de Recherche en Infectiologie, Lyon, France.,Institut des Agents Infectieux, Laboratoire de Bactériologie, Hospices Civils de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Jason Tasse
- Pathogénie des Infections à Staphylocoque, Centre International de Recherche en Infectiologie, Lyon, France
| | - Fréderic Laurent
- Pathogénie des Infections à Staphylocoque, Centre International de Recherche en Infectiologie, Lyon, France.,Institut des Agents Infectieux, Laboratoire de Bactériologie, Hospices Civils de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France.,Institut des Sciences Pharmaceutiques et Biologiques, Lyon, France
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13
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Hubiche T, Chiaverini C, Goujon E, Bourrat E, Bes M, Del Giudice P, Boralevi F. Multiple neonatal staphylococcal cold abscesses in large skin folds: a benign neonatal skin infection. J Eur Acad Dermatol Venereol 2018; 33:e125-e128. [PMID: 30388319 DOI: 10.1111/jdv.15323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- T Hubiche
- Department of Dermatology and Infectious Diseases, Fréjus Saint Raphaël Hospital, Fréjus, France
| | - C Chiaverini
- Department of Dermatology, Nice Hospital (CHU), Nice, France
| | - E Goujon
- Department of Dermatology, CH, Chalon sur Saône, France
| | - E Bourrat
- Department of Pediatric Dermatology, Robert-Debré Hospital, Paris, France
| | - M Bes
- National Reference Center for Staphylococci, International Center of Infectious Research, Institut National de la Santé et de la Recherche Médicale (INSERM) U1111, CNRS UMR5308, University of Lyon 1, ENS of Lyon, Lyon, France
| | - P Del Giudice
- Department of Dermatology and Infectious Diseases, Fréjus Saint Raphaël Hospital, Fréjus, France
| | - F Boralevi
- Department of Pediatric Dermatology, National Center for Rare Skin Disorders- INSERM U1035, Bordeaux, France
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14
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Hodille E, Badiou C, Bouveyron C, Bes M, Tristan A, Vandenesch F, Lina G, Dumitrescu O. Clindamycin suppresses virulence expression in inducible clindamycin-resistant Staphylococcus aureus strains. Ann Clin Microbiol Antimicrob 2018; 17:38. [PMID: 30342546 PMCID: PMC6195712 DOI: 10.1186/s12941-018-0291-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 10/11/2018] [Indexed: 01/23/2023] Open
Abstract
Clindamycin is a protein synthesis inhibitory agent that has the ability to suppress the expression of virulence factors in Staphylococcus aureus. Recent guidelines recommend the use of clindamycin for the treatment of toxin-mediated infections. Clindamycin modulates virulence expression at sub-inhibitory concentrations (sub-MICs) in clindamycin-susceptible S. aureus strains but previous report shown that this effect was supressed for constitutive clindamycin resistant strains. However, no data are currently available on the impact of clindamycin at sub-MICs on the virulence of inducible clindamycin-resistant S. aureus strains. Here, we show that sub-MICs of clindamycin decrease Panton–Valentine leucocidin, toxic-shock-staphylococcal toxin (TSST-1) and alpha-haemolysin (Hla) expression in six inducible clindamycin-resistant isolates cultivated in vitro in CCY medium. These results suggest that the clindamycin anti-toxin effect is retained for inducible clindamycin-resistant S. aureus isolates; therefore, its usage should be considered within the treatment regimen of toxin related infections for inducible clindamycin-resistant S. aureus.
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Affiliation(s)
- Elisabeth Hodille
- Department of Bacteriology, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France. .,Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, CNRS UMR5308, ENS Lyon, Université Lyon 1, Lyon, France.
| | - Cédric Badiou
- Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, CNRS UMR5308, ENS Lyon, Université Lyon 1, Lyon, France
| | - Caroline Bouveyron
- Department of Bacteriology, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France.,National Reference Center for Staphylococci, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France
| | - Michèle Bes
- Department of Bacteriology, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France.,National Reference Center for Staphylococci, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, CNRS UMR5308, ENS Lyon, Université Lyon 1, Lyon, France
| | - Anne Tristan
- Department of Bacteriology, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France.,National Reference Center for Staphylococci, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, CNRS UMR5308, ENS Lyon, Université Lyon 1, Lyon, France
| | - François Vandenesch
- Department of Bacteriology, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France.,National Reference Center for Staphylococci, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, CNRS UMR5308, ENS Lyon, Université Lyon 1, Lyon, France
| | - Gérard Lina
- Department of Bacteriology, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France.,National Reference Center for Staphylococci, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, CNRS UMR5308, ENS Lyon, Université Lyon 1, Lyon, France
| | - Oana Dumitrescu
- Department of Bacteriology, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France.,National Reference Center for Staphylococci, Hospices Civils de Lyon, Hôpital de la Croix-Rousse, Centre de Biologie Nord, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), INSERM U1111, CNRS UMR5308, ENS Lyon, Université Lyon 1, Lyon, France
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15
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Akkou M, Bouchiat C, Antri K, Bes M, Tristan A, Dauwalder O, Martins-Simoes P, Rasigade JP, Etienne J, Vandenesch F, Ramdani-Bouguessa N, Laurent F. New host shift from human to cows within Staphylococcus aureus involved in bovine mastitis and nasal carriage of animal's caretakers. Vet Microbiol 2018; 223:173-180. [PMID: 30173744 DOI: 10.1016/j.vetmic.2018.08.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/01/2018] [Accepted: 08/02/2018] [Indexed: 12/23/2022]
Abstract
Staphylococcus aureus is a commensal and pathogen of both humans and bovines. While the epidemiology of both groups has been extensively studied individually, little is known about the potential zoonotic transfer from animal strains to human being and vice versa. To determine the S. aureus prevalence of bovine mastitis in Algeria and the zoonotic transfer of strains to human beings, mastitis milk samples were collected, and professionals in a close contact with bovines were nasal swabbed. S. aureus isolates were all characterized by methicillin resistance and spa-typing. DNA microarrays analysis was performed on a subset of strains in order to detect other virulence factors, including toxins, and to assign the isolates to theirs MLST clonal complexes. Overall, 116/222 (52.3%) cows suffered from mastitis, whose 38.8% (45/116) infected with S. aureus. Human nasal carriage was of 38% (49/129), with only 4 MRSA carriers (3.1%). A higher diversity of spa-types was observed in human (35/50) than in bovine (18/67) isolates, with a predominance of clonal complexes CC97 and CC22 in bovines. The typical animal clone CC97 was occasionally detected in human beings. Conversely, the CC22 S. aureus clone largely switched from humans to bovines. Our study highlights the potential dynamics of animal and human S. aureus strains in the farm environment in Algeria, which may represent a health threat in both populations.
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Affiliation(s)
- Madjid Akkou
- Institut des Sciences Vétérinaires, Université Blida1, 09000, Blida, Algeria.
| | - Coralie Bouchiat
- Inserm U851, IFR 128, CNR des Staphylocoques, Université de Lyon1, 69008, Lyon, France; Centre de biologie Est, Hospices Civils de Lyon, 69500 Bron, France
| | - Kenza Antri
- Département de Biologie Cellulaire et Moléculaire, USTHB, 16000, Alger, Algeria
| | - Michèle Bes
- Inserm U851, IFR 128, CNR des Staphylocoques, Université de Lyon1, 69008, Lyon, France; Centre de biologie Est, Hospices Civils de Lyon, 69500 Bron, France
| | - Anne Tristan
- Inserm U851, IFR 128, CNR des Staphylocoques, Université de Lyon1, 69008, Lyon, France; Centre de biologie Est, Hospices Civils de Lyon, 69500 Bron, France
| | - Olivier Dauwalder
- Inserm U851, IFR 128, CNR des Staphylocoques, Université de Lyon1, 69008, Lyon, France; Centre de biologie Est, Hospices Civils de Lyon, 69500 Bron, France
| | - Patricia Martins-Simoes
- Inserm U851, IFR 128, CNR des Staphylocoques, Université de Lyon1, 69008, Lyon, France; Centre de biologie Est, Hospices Civils de Lyon, 69500 Bron, France
| | - Jean-Philippe Rasigade
- Inserm U851, IFR 128, CNR des Staphylocoques, Université de Lyon1, 69008, Lyon, France; Centre de biologie Est, Hospices Civils de Lyon, 69500 Bron, France
| | - Jérôme Etienne
- Inserm U851, IFR 128, CNR des Staphylocoques, Université de Lyon1, 69008, Lyon, France; Centre de biologie Est, Hospices Civils de Lyon, 69500 Bron, France
| | - François Vandenesch
- Inserm U851, IFR 128, CNR des Staphylocoques, Université de Lyon1, 69008, Lyon, France; Centre de biologie Est, Hospices Civils de Lyon, 69500 Bron, France
| | | | - Frédéric Laurent
- Inserm U851, IFR 128, CNR des Staphylocoques, Université de Lyon1, 69008, Lyon, France; Centre de biologie Est, Hospices Civils de Lyon, 69500 Bron, France
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16
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Jacquemond I, Muggeo A, Lamblin G, Tristan A, Gillet Y, Bolze PA, Bes M, Gustave CA, Rasigade JP, Golfier F, Ferry T, Dubost A, Abrouk D, Barreto S, Prigent-Combaret C, Thioulouse J, Lina G, Muller D. Complex ecological interactions of Staphylococcus aureus in tampons during menstruation. Sci Rep 2018; 8:9942. [PMID: 29967393 PMCID: PMC6028614 DOI: 10.1038/s41598-018-28116-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 06/11/2018] [Indexed: 01/08/2023] Open
Abstract
Menstrual toxic shock syndrome (mTSS) is a severe disease that occurs in healthy women vaginally colonized by Staphylococcus aureus producing toxic shock toxin 1 and who use tampons. The aim of the present study was to determine the impact of the composition of vaginal microbial communities on tampon colonisation by S. aureus during menses. We analysed the microbiota in menstrual fluids extracted from tampons from 108 healthy women and 7 mTSS cases. Using culture, S. aureus was detected in menstrual fluids of 40% of healthy volunteers and 100% of mTSS patients. Between class analysis of culturomic and 16S rRNA gene metabarcoding data indicated that the composition of the tampons' microbiota differs according to the presence or absence of S. aureus and identify discriminating genera. However, the bacterial communities of tampon fluid positive for S. aureus did not cluster together. No difference in tampon microbiome richness, diversity, and ecological distance was observed between tampon vaginal fluids with or without S. aureus, and between healthy donors carrying S. aureus and mTSS patients. Our results show that the vagina is a major niche of. S. aureus in tampon users and the composition of the tampon microbiota control its virulence though more complex interactions than simple inhibition by lactic acid-producing bacterial species.
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Affiliation(s)
- Isaline Jacquemond
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
| | - Anaëlle Muggeo
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
| | - Gery Lamblin
- Department of Gynecology, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France
| | - Anne Tristan
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
- Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Yves Gillet
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
- Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
- Department of Pediatric Emergency, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France
| | - Pierre Adrien Bolze
- Department of Gynecological Surgery and Oncology, Obstetrics, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, Pierre Bénite, France
| | - Michèle Bes
- Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Claude Alexandre Gustave
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
- Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Jean-Philippe Rasigade
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
- Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - François Golfier
- Department of Gynecological Surgery and Oncology, Obstetrics, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, Pierre Bénite, France
| | - Tristan Ferry
- Service des maladies infectieuses et tropicales, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Audrey Dubost
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France
| | - Danis Abrouk
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France
| | - Samuel Barreto
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France
- Université Lyon 1, CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, Villeurbanne, France
| | - Claire Prigent-Combaret
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France
| | - Jean Thioulouse
- Université Lyon 1, CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, Villeurbanne, France
| | - Gérard Lina
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France.
- Centre National de Référence des Staphylocoques, Institut des Agent infectieux, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France.
| | - Daniel Muller
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA, VetAgro Sup, UMR Ecologie Microbienne, 43 bd du 11 Novembre, F-69622, Villeurbanne, France.
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17
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Antri K, Akkou M, Bouchiat C, Bes M, Martins-Simoes P, Dauwalder O, Tristan A, Meugnier H, Rasigade JP, Etienne J, Vandenesch F, Laurent F, Ramdani-Bouguessa N. High levels of Staphylococcus aureus and MRSA carriage in healthy population of Algiers revealed by additional enrichment and multisite screening. Eur J Clin Microbiol Infect Dis 2018; 37:1521-1529. [PMID: 29948361 DOI: 10.1007/s10096-018-3279-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 05/09/2018] [Indexed: 11/30/2022]
Abstract
The purpose of the research is to characterize Staphylococcus aureus colonization in healthy population of Algiers, to assess the impact on diagnostic performance of systematic additional broth enrichment, and to ascertain the additional benefits of multiple site screening. In order to more accurately determine the prevalence of S. aureus colonization, the swab specimens from multiple screening sites were incubated in brain-heart broth before agar plating. From 2009 to 2011, 1176 samples were collected from 459 participants (201 adults and 258 children). The additional enrichment detection step significantly increased S. aureus detection rates (p < 0.0001). S. aureus nasal detection was positive in 37.8% of adults, and the addition of throat samplings significantly increased the S. aureus detection rate up to 54.7% (p < 0.001). S. aureus nasal detection was positive in 37.6% of children. The addition of throat samplings in children significantly increased the S. aureus detection rate up to 53.1% (p < 0.001) and that of anal samplings up to 59.7%. The overall prevalence of methicillin-resistant S. aureus was 5.2% (3% of adults and 7% of children). spa typing of all isolates revealed a diverse but strongly clonal S. aureus population structure. This approach involving multiple anatomical sampling sites and an additional enrichment of the swabs before conventional culture significantly increases the detection rate of S. aureus carriers and may prove valuable to improve global S. aureus infection prevention.
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Affiliation(s)
- Kenza Antri
- Service de Microbiologie, Centre Hospitalo-Universitaire Mustapha Bacha, Algiers, Algeria.,Département de Biologie Cellulaire et Moléculaire, Faculté des Sciences Biologiques, Université des Sciences et de la Technologie Houari-Boumediène, Algiers, Algeria
| | - Madjid Akkou
- Institut des Sciences Vétérinaires, Université Blida1, 09000, Blida, Algeria.
| | - Coralie Bouchiat
- CIRI, International Center for Infectiology Research, Université de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Michèle Bes
- CIRI, International Center for Infectiology Research, Université de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Patricia Martins-Simoes
- CIRI, International Center for Infectiology Research, Université de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Olivier Dauwalder
- CIRI, International Center for Infectiology Research, Université de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Anne Tristan
- CIRI, International Center for Infectiology Research, Université de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Hélène Meugnier
- CIRI, International Center for Infectiology Research, Université de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Jean-Philippe Rasigade
- CIRI, International Center for Infectiology Research, Université de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Jerome Etienne
- CIRI, International Center for Infectiology Research, Université de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - François Vandenesch
- CIRI, International Center for Infectiology Research, Université de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Frédéric Laurent
- CIRI, International Center for Infectiology Research, Université de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Nadjia Ramdani-Bouguessa
- Service de Microbiologie, Centre Hospitalo-Universitaire Mustapha Bacha, Algiers, Algeria.,Laboratoire d'analyses Médicales, Baraki, Algiers, Algeria
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18
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Rasigade JP, Leclère A, Alla F, Tessier A, Bes M, Lechiche C, Vernet-Garnier V, Laouénan C, Vandenesch F, Leport C. Staphylococcus aureus CC30 Lineage and Absence of sed, j, r-Harboring Plasmid Predict Embolism in Infective Endocarditis. Front Cell Infect Microbiol 2018; 8:187. [PMID: 29938201 PMCID: PMC6003251 DOI: 10.3389/fcimb.2018.00187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 05/14/2018] [Indexed: 12/28/2022] Open
Abstract
Staphylococcus aureus induces severe infective endocarditis (IE) where embolic complications are a major cause of death. Risk factors for embolism have been reported such as a younger age or larger IE vegetations, while methicillin resistance conferred by the mecA gene appeared as a protective factor. It is unclear, however, whether embolism is influenced by other S. aureus characteristics such as clonal complex (CC) or virulence pattern. We examined clinical and microbiological predictors of embolism in a prospective multicentric cohort of 98 French patients with monomicrobial S. aureus IE. The genomic contents of causative isolates were characterized using DNA array. To preserve statistical power, genotypic predictors were restricted to CC, secreted virulence factors and virulence regulators. Multivariate regularized logistic regression identified three independent predictors of embolism. Patients at higher risk were younger than the cohort median age of 62.5 y (adjusted odds ratio [OR] 0.14; 95% confidence interval [CI] 0.05-0.36). S. aureus characteristics predicting embolism were a CC30 genetic background (adjusted OR 9.734; 95% CI 1.53-192.8) and the absence of pIB485-like plasmid-borne enterotoxin-encoding genes sed, sej, and ser (sedjr; adjusted OR 0.07; 95% CI 0.004-0.457). CC30 S. aureus has been repeatedly reported to exhibit enhanced fitness in bloodstream infections, which might impact its ability to cause embolism. sedjr-encoded enterotoxins, whose superantigenic activity is unlikely to protect against embolism, possibly acted as a proxy to others genes of the pIB485-like plasmid found in genetically unrelated isolates from mostly embolism-free patients. mecA did not independently predict embolism but was strongly associated with sedjr. This mecA-sedjr association might have driven previous reports of a negative association of mecA and embolism. Collectively, our results suggest that the influence of S. aureus genotypic features on the risk of embolism may be stronger than previously suspected and independent of clinical risk factors.
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Affiliation(s)
- Jean-Philippe Rasigade
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Amélie Leclère
- UMR-1137, Université Paris Diderot, Sorbonne Paris Cité, Paris, France.,Institut National de la Santé et de la Recherche Médicale, UMR-1137, Paris, France
| | - François Alla
- CIC-1433 Epidémiologie Clinique, Institut National de la Santé et de la Recherche Médicale, Centre Hospitalier Universitaire de Nancy, Nancy, France.,EA4360, Apemac, Université de Lorraine, Nancy, France
| | - Adrien Tessier
- UMR-1137, Université Paris Diderot, Sorbonne Paris Cité, Paris, France.,Institut National de la Santé et de la Recherche Médicale, UMR-1137, Paris, France
| | - Michèle Bes
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Catherine Lechiche
- Service de Maladies Infectieuses et Tropicales Centre Hospitalier Universitaire de Nîmes Caremeau, Nîmes, France
| | - Véronique Vernet-Garnier
- Faculté de Médecine EA 4687 Université de Reims Champagne Ardenne, Reims, France.,Laboratoire de Bactériologie, Centre Hospitalier Universitaire de Reims Robert Debré, Reims, France
| | - Cédric Laouénan
- UMR-1137, Université Paris Diderot, Sorbonne Paris Cité, Paris, France.,Institut National de la Santé et de la Recherche Médicale, UMR-1137, Paris, France.,Service de Biostatistiques, Hôpital Bichat, AP-HP, Paris, France
| | - François Vandenesch
- CIRI, Centre International de Recherche en Infectiologie, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France.,Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Catherine Leport
- UMR-1137, Université Paris Diderot, Sorbonne Paris Cité, Paris, France.,Institut National de la Santé et de la Recherche Médicale, UMR-1137, Paris, France.,Unité de Coordination du Risque Épidémique et Biologique, AP-HP, Paris, France
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Gustave CA, Tristan A, Martins-Simões P, Stegger M, Benito Y, Andersen PS, Bes M, Le Hir T, Diep BA, Uhlemann AC, Glaser P, Laurent F, Wirth T, Vandenesch F. Demographic fluctuation of community-acquired antibiotic-resistant Staphylococcus aureus lineages: potential role of flimsy antibiotic exposure. ISME J 2018; 12:1879-1894. [PMID: 29599521 DOI: 10.1038/s41396-018-0110-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 03/03/2018] [Accepted: 03/12/2018] [Indexed: 01/28/2023]
Abstract
Community-acquired (CA)- as opposed to hospital acquired- methicillin-resistant Staphylococcus aureus (MRSA) lineages arose worldwide during the 1990s. To determine which factors, including selective antibiotic pressure, govern the expansion of two major lineages of CA-MRSA, namely "USA300" in Northern America and "European ST80" in North Africa, Europe and Middle-East, we explored virulence factor expression, and fitness levels with or without antibiotics. The sampled strains were collected in a temporal window representing various steps of the epidemics, reflecting predicted changes in effective population size as inferred from whole-genome analysis. In addition to slight variations in virulence factor expression and biofilm production that might influence the ecological niches of theses lineages, competitive fitness experiments revealed that the biological cost of resistance to methicillin, fusidic acid and fluoroquinolones is totally reversed in the presence of trace amount of antibiotics. Our results suggest that low-level antibiotics exposure in human and animal environments contributed to the expansion of both European ST80 and USA300 lineages in community settings. This surge was likely driven by antibiotic (ab)use promoting the accumulation of antibiotics as environmental pollutants. The current results provide a novel link between effective population size increase of a pathogen and a selective advantage conferred by antibiotic resistance.
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Affiliation(s)
- Claude-Alexandre Gustave
- CIRI - Centre International de Recherche en Infectiologie, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Univ Lyon, F-69007, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Anne Tristan
- CIRI - Centre International de Recherche en Infectiologie, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Univ Lyon, F-69007, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Patricia Martins-Simões
- CIRI - Centre International de Recherche en Infectiologie, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Univ Lyon, F-69007, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Marc Stegger
- Department for Bacteria, Parasites and Fungi, Statens Serum Institut, Copenhagen, Denmark
| | - Yvonne Benito
- CIRI - Centre International de Recherche en Infectiologie, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Univ Lyon, F-69007, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Paal Skytt Andersen
- Department for Bacteria, Parasites and Fungi, Statens Serum Institut, Copenhagen, Denmark.,Department of Veterinary and Animal Sciences, Frederiksberg, Denmark
| | - Michèle Bes
- CIRI - Centre International de Recherche en Infectiologie, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Univ Lyon, F-69007, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Typhanie Le Hir
- CIRI - Centre International de Recherche en Infectiologie, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Univ Lyon, F-69007, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Binh An Diep
- Division of HIV, Infectious Diseases, and Global Medicine, Department of Medicine, University of California, San Francisco, CA, USA
| | - Anne-Catrin Uhlemann
- Department of Medicine, Division of Infectious Diseases, Columbia University Medical Center, New York City, NY, USA
| | - Philippe Glaser
- Institut Pasteur - APHP - Université Paris Sud, Unité Ecologie et Evolution de la Résistance aux Antibiotiques Paris, France, CNRS UMR3525, Paris, France
| | - Frédéric Laurent
- CIRI - Centre International de Recherche en Infectiologie, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Univ Lyon, F-69007, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France
| | - Thierry Wirth
- Institut de Systématique, Evolution, Biodiversité (ISYEB - UMR 7205, CNRS, MNHN, UPMC, EPHE), Muséum National d'Histoire Naturelle, Sorbonne Universités, Paris, France.,EPHE, PSL University, Paris, France
| | - François Vandenesch
- CIRI - Centre International de Recherche en Infectiologie, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Univ Lyon, F-69007, Lyon, France. .,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.
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20
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Durand G, Javerliat F, Bes M, Veyrieras JB, Guigon G, Mugnier N, Schicklin S, Kaneko G, Santiago-Allexant E, Bouchiat C, Martins-Simões P, Laurent F, Van Belkum A, Vandenesch F, Tristan A. Routine Whole-Genome Sequencing for Outbreak Investigations of Staphylococcus aureus in a National Reference Center. Front Microbiol 2018; 9:511. [PMID: 29616014 PMCID: PMC5869177 DOI: 10.3389/fmicb.2018.00511] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 03/06/2018] [Indexed: 11/25/2022] Open
Abstract
The French National Reference Center for Staphylococci currently uses DNA arrays and spa typing for the initial epidemiological characterization of Staphylococcus aureus strains. We here describe the use of whole-genome sequencing (WGS) to investigate retrospectively four distinct and virulent S. aureus lineages [clonal complexes (CCs): CC1, CC5, CC8, CC30] involved in hospital and community outbreaks or sporadic infections in France. We used a WGS bioinformatics pipeline based on de novo assembly (reference-free approach), single nucleotide polymorphism analysis, and on the inclusion of epidemiological markers. We examined the phylogeographic diversity of the French dominant hospital-acquired CC8-MRSA (methicillin-resistant S. aureus) Lyon clone through WGS analysis which did not demonstrate evidence of large-scale geographic clustering. We analyzed sporadic cases along with two outbreaks of a CC1-MSSA (methicillin-susceptible S. aureus) clone containing the Panton–Valentine leukocidin (PVL) and results showed that two sporadic cases were closely related. We investigated an outbreak of PVL-positive CC30-MSSA in a school environment and were able to reconstruct the transmission history between eight families. We explored different outbreaks among newborns due to the CC5-MRSA Geraldine clone and we found evidence of an unsuspected link between two otherwise distinct outbreaks. Here, WGS provides the resolving power to disprove transmission events indicated by conventional methods (same sequence type, spa type, toxin profile, and antibiotic resistance profile) and, most importantly, WGS can reveal unsuspected transmission events. Therefore, WGS allows to better describe and understand outbreaks and (inter-)national dissemination of S. aureus lineages. Our findings underscore the importance of adding WGS for (inter-)national surveillance of infections caused by virulent clones of S. aureus but also substantiate the fact that technological optimization at the bioinformatics level is still urgently needed for routine use. However, the greatest limitation of WGS analysis is the completeness and the correctness of the reference database being used and the conversion of floods of data into actionable results. The WGS bioinformatics pipeline (EpiSeqTM) we used here can easily generate a uniform database and associated metadata for epidemiological applications.
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Affiliation(s)
| | | | - Michèle Bes
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Lyon, France
| | | | | | | | | | - Gaël Kaneko
- Data Analytics Unit, bioMérieux, Marcy-I'Étoile, France
| | | | - Coralie Bouchiat
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Lyon, France
| | | | - Frederic Laurent
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Lyon, France
| | | | - François Vandenesch
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Lyon, France
| | - Anne Tristan
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Lyon, France
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21
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Javouhey E, Bolze PA, Jamen C, Lina G, Badiou C, Poyart C, Portefaix A, Tristan A, Laurent F, Bes M, Vandenesch F, Gilletand Y, Dauwalder O. Similarities and Differences Between Staphylococcal and Streptococcal Toxic Shock Syndromes in Children: Results From a 30-Case Cohort. Front Pediatr 2018; 6:360. [PMID: 30547021 PMCID: PMC6280580 DOI: 10.3389/fped.2018.00360] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 11/05/2018] [Indexed: 11/24/2022] Open
Abstract
Introduction: Toxic shock syndromes (TSS) are severe shocks due to staphylococcal or streptococcal infection that require specific treatments. The early recognition of these shocks is crucial to improve their outcomes. Objectives: The primary objective of this study was to compare characteristics and outcomes of staphylococcal and streptococcal TSS in children, in order to identify putative early clinical diagnostic criteria. Secondary objectives were to determine the toxin gene profiles of associated isolated strains and the relevance of measuring Vβ T-cell signatures to confirm the diagnosis. Study design: We performed a multicenter retrospective evaluation of clinical data, biological results, and treatment outcomes of children with a confirmed or probable case of staphylococcal or streptococcal TSS. Children were consecutively included if they were admitted to the pediatric intensive care units of Lyon (France), between January 2005 and July 2011. Results: Among the 30 analyzed children, 15 presented staphylococcal TSS and 15 streptococcal TSS. The most frequent origin of staphylococcal and streptococcal TSS was the lower respiratory tract (53%) and the genital tract (47%) respectively. Non-menstrual TSS syndrome cases presented more frequently with neurological alterations, and digestive signs were predominant in menstrual forms. Compared to Staphylococcal TSS, Streptococcal TSS presented with higher organ dysfunction scores (median Pediatric Index of Mortality 2 score 20.9 (4.1-100) vs. 1.7 (1.3-2.3), p = 0.001), required respiratory support more frequently (80 vs. 33%, p = 0.02), were intubated for a longer time (3 days (0.75-5) vs. 1 day (0-1.5), p = 0.006) and had a non-significant trend of higher, case-fatality rate (20 vs. 7%, p = 0.60). The lack of antitoxin therapy was associated with higher case-fatality rate (50 vs. 4%, p = 0.04). The Vβ repertoire measurements exhibited toxin dependent-alterations in accordance with the toxin gene profiles of isolated strains in both types of toxic shock syndromes. Regarding toxin gene profiles of isolated strains, 10/15 Staphylococcus aureus belonged to clonal complex (CC) 30 and 6/12 Streptococcus pyogenes were emm1 type suggesting clonal etiologies for both staphylococcal and streptococcal TSS. Conclusion: Despite the involvement of functionally similar toxins, staphylococcal and streptococcal TSS differed by their clinical signs, origin of infection and prognosis. The detection of Vβ profiles was useful to confirm the diagnosis of staphylococcal and streptococcal TSS and for the identification of involved toxins.
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Affiliation(s)
- Etienne Javouhey
- Pediatric Emergency and Critical Care Unit, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France.,Faculté de Médecine Lyon Est, Université de Lyon, Domaine de la Buire, Lyon, France
| | - Pierre-Adrien Bolze
- Service de Gynécologie et Obstétrique, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France
| | - Claire Jamen
- Pediatric Emergency and Critical Care Unit, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France
| | - Gerard Lina
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Centre de Biologie et de Pathologie Nord, Hospices Civils de Lyon, Lyon, France.,Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Nord, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, Lyon, France
| | - Cédric Badiou
- Centre International de Recherche en Infectiologie (CIRI), Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, Lyon, France
| | - Claire Poyart
- Centre National de Références des Streptocoques - Groupe Hospitalier Paris Centre Cochin-Hôtel Dieu-Broca, Assistance Publique Hôpitaux de Paris, Paris, France.,Institut Cochin Université Sorbonne Paris Descartes, Paris, France.,INSERM 1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Institut Cochin, Paris, France
| | - Aurelie Portefaix
- Pediatric Emergency and Critical Care Unit, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France.,EPICIME-CIC 1407 de Lyon, Inserm, Service de Pharmacotoxicologie, Hospices Civils de Lyon, Bron, France
| | - Anne Tristan
- Faculté de Médecine Lyon Est, Université de Lyon, Domaine de la Buire, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Centre de Biologie et de Pathologie Nord, Hospices Civils de Lyon, Lyon, France.,Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Nord, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, Lyon, France
| | - Frédéric Laurent
- Faculté de Médecine Lyon Est, Université de Lyon, Domaine de la Buire, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Centre de Biologie et de Pathologie Nord, Hospices Civils de Lyon, Lyon, France.,Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Nord, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, Lyon, France
| | - Michèle Bes
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Centre de Biologie et de Pathologie Nord, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, Lyon, France
| | - François Vandenesch
- Faculté de Médecine Lyon Est, Université de Lyon, Domaine de la Buire, Lyon, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Centre de Biologie et de Pathologie Nord, Hospices Civils de Lyon, Lyon, France.,Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Nord, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, Lyon, France
| | - Yves Gilletand
- Pediatric Emergency and Critical Care Unit, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France.,Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Centre de Biologie et de Pathologie Nord, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, Lyon, France
| | - Olivier Dauwalder
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Centre de Biologie et de Pathologie Nord, Hospices Civils de Lyon, Lyon, France.,Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Nord, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France.,Centre International de Recherche en Infectiologie (CIRI), Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, Lyon, France
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22
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Bettembourg M, Dal-Soglio M, Bureau C, Vernet A, Dardoux A, Portefaix M, Bes M, Meynard D, Mieulet D, Cayrol B, Perin C, Courtois B, Ma JF, Dievart A. Root cone angle is enlarged in docs1 LRR-RLK mutants in rice. Rice (N Y) 2017; 10:50. [PMID: 29247303 PMCID: PMC5732118 DOI: 10.1186/s12284-017-0190-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 11/30/2017] [Indexed: 05/24/2023]
Abstract
BACKGROUND The DEFECTIVE IN OUTER CELL LAYER SPECIFICATION 1 (DOCS1) gene belongs to the Leucine-Rich Repeat Receptor-Like Kinase (LRR-RLK) subfamily. It has been discovered few years ago in Oryza sativa (rice) in a screen to isolate mutants with defects in sensitivity to aluminum. The c68 (docs1-1) mutant possessed a nonsense mutation in the C-terminal part of the DOCS1 kinase domain. FINDINGS We have generated a new loss-of-function mutation in the DOCS1 gene (docs1-2) using the CRISPR-Cas9 technology. This new loss-of-function mutant and docs1-1 present similar phenotypes suggesting the original docs1-1 was a null allele. Besides the aluminum sensitivity phenotype, both docs1 mutants shared also several root phenotypes described previously: less root hairs and mixed identities of the outer cell layers. Moreover, our new results suggest that DOCS1 could also play a role in root cap development. We hypothesized these docs1 root phenotypes may affect gravity responses. As expected, in seedlings, the early gravitropic response was delayed. Furthermore, at adult stage, the root gravitropic set angle of docs1 mutants was also affected since docs1 mutant plants displayed larger root cone angles. CONCLUSIONS All these observations add new insights into the DOCS1 gene function in gravitropic responses at several stages of plant development.
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Affiliation(s)
- M. Bettembourg
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - M. Dal-Soglio
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - C. Bureau
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - A. Vernet
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - A. Dardoux
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - M. Portefaix
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - M. Bes
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - D. Meynard
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - D. Mieulet
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - B. Cayrol
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - C. Perin
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - B. Courtois
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - J. F. Ma
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, 710-0046 Japan
| | - A. Dievart
- CIRAD, UMR AGAP, F34398 Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
- Present address: Shanghai Jiao Tong University (SJTU), School of Life Sciences and Biotechnology, Shanghai, 200240 China
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Haenni M, Châtre P, Dupieux-Chabert C, Métayer V, Bes M, Madec JY, Laurent F. Molecular Epidemiology of Methicillin-Resistant Staphylococcus aureus in Horses, Cats, and Dogs Over a 5-Year Period in France. Front Microbiol 2017; 8:2493. [PMID: 29326664 PMCID: PMC5733339 DOI: 10.3389/fmicb.2017.02493] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 11/30/2017] [Indexed: 11/13/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) has been reported as a worldwide pathogen in humans and animals including companion animals, i.e., cats, dogs, and horses. France lacked a comprehensive nationwide study describing the molecular features of MRSA circulating among companion animals over a large period of time. Here is reported the characterization of 130 non-duplicate clinical MRSA isolates collected from those three animal species from 2010 to 2015 through the French national Resapath network. Characterization of isolates was performed using phenotypic (antimicrobial susceptibility tests) and molecular (DNA arrays, spa-typing) methods. A horse-specific epidemiology was observed in France with the large dissemination of a unique clone, the CC398 clone harboring a Staphylococcal chromosomal cassette mec (SCCmec) type IV and spa-type t011. It was even the unique clone collected in 2015 whereas the clone CC8 USA500 (SCCmec type IV), classically described in horses, was present until 2014. Contrarily, cats and dogs were mainly infected by human-related MRSA isolates, i.e., clones usually reported in human infections, thus mirroring the human epidemiology in hospitals in France. Isolates belonging to the CC398 clone (SCCmec type IV or V) were also identified in 21.4% of dogs' and 26.5% of cats' MRSA isolates. In order to differentiate human-related from CC398 MRSA, tetracycline-resistance [or tet(M) detection] could be useful since this resistance is scarce in human-related strains but constant in CC398 MRSA isolates. In all, our data give a nationwide epidemiological picture of MRSA in companion animals over a 5-year period in France, adding further epidemiological information on the contribution of those animal species to a major public health issue. Considering the wide dissemination of CC398 MRSA isolates and the fact that 11/64 (17.2%) of them presented the Immune Evasion Cluster which enhances CC398 capacities to colonize humans, a specific attention should be paid in the coming years to determine the risk associated to the transmission in people in frequent contacts with companion animals. Our data also show that the prevalence of MRSA has likely decreased in cats, dogs, and horses between 2012 and 2015 in France. This trend should be monitored in the years to come.
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Affiliation(s)
- Marisa Haenni
- Unité Antibiorésistance et Virulence Bactériennes, French Agency for Food, Environmental and Occupational Health Safety, Claude Bernard University Lyon 1, Lyon, France
| | - Pierre Châtre
- Unité Antibiorésistance et Virulence Bactériennes, French Agency for Food, Environmental and Occupational Health Safety, Claude Bernard University Lyon 1, Lyon, France
| | - Céline Dupieux-Chabert
- Bacteriology Department, Institut for Infectious Agents, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, Lyon, France.,INSERM U1111, CNRS, International Center for Infectiology Research, UMR5308, École Normale Supérieure de Lyon, Claude Bernard University Lyon 1, Lyon, France
| | - Véronique Métayer
- Unité Antibiorésistance et Virulence Bactériennes, French Agency for Food, Environmental and Occupational Health Safety, Claude Bernard University Lyon 1, Lyon, France
| | - Michèle Bes
- Bacteriology Department, Institut for Infectious Agents, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, Lyon, France.,INSERM U1111, CNRS, International Center for Infectiology Research, UMR5308, École Normale Supérieure de Lyon, Claude Bernard University Lyon 1, Lyon, France
| | - Jean-Yves Madec
- Unité Antibiorésistance et Virulence Bactériennes, French Agency for Food, Environmental and Occupational Health Safety, Claude Bernard University Lyon 1, Lyon, France
| | - Frédéric Laurent
- Bacteriology Department, Institut for Infectious Agents, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, Lyon, France.,INSERM U1111, CNRS, International Center for Infectiology Research, UMR5308, École Normale Supérieure de Lyon, Claude Bernard University Lyon 1, Lyon, France.,Institut for Pharmaceutical and Biological Sciences of Lyon, Lyon, France
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24
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Dupieux C, Trouillet-Assant S, Camus C, Abad L, Bes M, Benito Y, Chidiac C, Lustig S, Ferry T, Valour F, Laurent F. Intraosteoblastic activity of daptomycin in combination with oxacillin and ceftaroline against MSSA and MRSA. J Antimicrob Chemother 2017; 72:3353-3356. [PMID: 28961767 DOI: 10.1093/jac/dkx314] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 07/31/2017] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND The Staphylococcus aureus intracellular reservoir is associated with bone and joint infection (BJI) chronicity. As daptomycin is increasingly prescribed in BJI, strategies for improving its reduced intracellular activity should be promoted. OBJECTIVES Based on the known in vitro synergy of daptomycin with β-lactams, the aim of the present study was to evaluate the intracellular activity of these combinations in an ex vivo osteoblast infection model. METHODS Osteoblastic cells infected with an MRSA strain or its isogenic MSSA counterpart were incubated for 24 h with daptomycin, oxacillin or ceftaroline alone or in combination using usual intraosseous therapeutic concentrations. Intracellular bacteria were quantified by plating cell lysates. MICs for MSSA and MRSA were determined using the chequerboard method at pH 5 to mimic conditions expected within lysosomes, the foremost S. aureus intracellular location. RESULTS Daptomycin failed to reduce the intracellular MSSA inoculum, and was weakly active against MRSA compared with untreated cells (-27.6%; P < 10-3). Oxacillin and ceftaroline revealed significant intracellular activity, including oxacillin against MRSA-infected cells (-43.2%; P < 10-3). The daptomycin/oxacillin combination was significantly more active against intracellular MSSA and MRSA compared with daptomycin and oxacillin alone (-44.4% and -57.2%, respectively; P < 0.05). In contrast, daptomycin/ceftaroline was not more efficient than ceftaroline alone. Interestingly, oxacillin MICs for MRSA decreased in vitro from >256 to 0.023 mg/L when the pH decreased from 7 to 5, and chequerboards showed an additive effect of the daptomycin/oxacillin combination against MRSA at pH 5. CONCLUSIONS In acidic intracellular conditions, oxacillin enhances daptomycin activity against the intraosteoblastic reservoir of S. aureus, including MRSA.
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Affiliation(s)
- Céline Dupieux
- International Centre for Research in Infectiology, INSERM U1111, CNRS UMR5308, Claude Bernard Lyon 1 University, Lyon, France
- CRIOAc Lyon - French Regional Reference Centre for Bone and Joint Infection, Hospices Civils de Lyon, Lyon, France
- Laboratory of Bacteriology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, Lyon, France
| | - Sophie Trouillet-Assant
- International Centre for Research in Infectiology, INSERM U1111, CNRS UMR5308, Claude Bernard Lyon 1 University, Lyon, France
| | - Caroline Camus
- International Centre for Research in Infectiology, INSERM U1111, CNRS UMR5308, Claude Bernard Lyon 1 University, Lyon, France
| | - Lélia Abad
- International Centre for Research in Infectiology, INSERM U1111, CNRS UMR5308, Claude Bernard Lyon 1 University, Lyon, France
| | - Michèle Bes
- International Centre for Research in Infectiology, INSERM U1111, CNRS UMR5308, Claude Bernard Lyon 1 University, Lyon, France
- Laboratory of Bacteriology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, Lyon, France
| | - Yvonne Benito
- International Centre for Research in Infectiology, INSERM U1111, CNRS UMR5308, Claude Bernard Lyon 1 University, Lyon, France
- Laboratory of Bacteriology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, Lyon, France
| | - Christian Chidiac
- International Centre for Research in Infectiology, INSERM U1111, CNRS UMR5308, Claude Bernard Lyon 1 University, Lyon, France
- CRIOAc Lyon - French Regional Reference Centre for Bone and Joint Infection, Hospices Civils de Lyon, Lyon, France
- Department of Infectious Diseases, Hospices Civils de Lyon, 103 Grande-Rue de la Croix-Rousse, 69004 Lyon, France
| | - Sébastien Lustig
- International Centre for Research in Infectiology, INSERM U1111, CNRS UMR5308, Claude Bernard Lyon 1 University, Lyon, France
- CRIOAc Lyon - French Regional Reference Centre for Bone and Joint Infection, Hospices Civils de Lyon, Lyon, France
- Orthopaedic Surgery Unit, Hospices Civils de Lyon, Lyon, France
| | - Tristan Ferry
- International Centre for Research in Infectiology, INSERM U1111, CNRS UMR5308, Claude Bernard Lyon 1 University, Lyon, France
- CRIOAc Lyon - French Regional Reference Centre for Bone and Joint Infection, Hospices Civils de Lyon, Lyon, France
- Department of Infectious Diseases, Hospices Civils de Lyon, 103 Grande-Rue de la Croix-Rousse, 69004 Lyon, France
| | - Florent Valour
- International Centre for Research in Infectiology, INSERM U1111, CNRS UMR5308, Claude Bernard Lyon 1 University, Lyon, France
- CRIOAc Lyon - French Regional Reference Centre for Bone and Joint Infection, Hospices Civils de Lyon, Lyon, France
- Department of Infectious Diseases, Hospices Civils de Lyon, 103 Grande-Rue de la Croix-Rousse, 69004 Lyon, France
| | - Frédéric Laurent
- International Centre for Research in Infectiology, INSERM U1111, CNRS UMR5308, Claude Bernard Lyon 1 University, Lyon, France
- CRIOAc Lyon - French Regional Reference Centre for Bone and Joint Infection, Hospices Civils de Lyon, Lyon, France
- Laboratory of Bacteriology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, Lyon, France
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Dupieux C, Kolenda C, Larsen AR, Pichon B, Holmes M, Bes M, Teale C, Dickson E, Hill R, Skov R, Kearns A, Laurent F. Variable performance of four commercial chromogenic media for detection of methicillin-resistant Staphylococcus aureus isolates harbouring mecC. Int J Antimicrob Agents 2017; 50:263-265. [DOI: 10.1016/j.ijantimicag.2017.03.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Accepted: 03/02/2017] [Indexed: 10/19/2022]
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26
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Riveiro-Barciela M, Bes M, Rodríguez-Frías F, Tabernero D, Ruiz A, Casillas R, Vidal-González J, Homs M, Nieto L, Sauleda S, Esteban R, Buti M. Serum hepatitis B core-related antigen is more accurate than hepatitis B surface antigen to identify inactive carriers, regardless of hepatitis B virus genotype. Clin Microbiol Infect 2017; 23:860-867. [PMID: 28288829 DOI: 10.1016/j.cmi.2017.03.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 02/24/2017] [Accepted: 03/05/2017] [Indexed: 12/14/2022]
Abstract
OBJECTIVES To investigate whether hepatitis B surface antigen (HBsAg) and hepatitis B core-related antigen (HBcrAg) levels are useful to identify inactive carriers among HBeAg-negative patients infected by different hepatitis B virus (HBV) genotypes. METHODS In all, 202 consecutive HBeAg-negative patients with chronic hepatitis B, 135 inactive carriers and 67 with HBV activity, were prospectively followed for 1 year. RESULTS In HBeAg-negative patients, HBsAg levels differed across the different genotypes (p <0.001). The highest levels were observed in genotypes F or H (4.2 ± 0.6 logIU/mL), followed by genotype E (3.4 ± 1.1 logIU/mL), genotype A (3.4 ± 0.8 logIU/mL), and the lowest in genotype D (2.7 ± 1.1 logIU/mL). Variations in HBsAg levels were similar in inactive carriers and patients with HBV activity. HBsAg <3 logIU/mL showed good performance for identifying genotype D inactive carriers: 76% of genotype D inactive carriers met this cut-off versus ≤31% for genotypes A, E, F or H. However, in patients with genotype A, HBsAg levels ≤3.7 logIU/mL better classified inactive carriers. The combination of a single measurement of HBcrAg ≤3 logU/mL plus HBV DNA ≤2000 IU/mL yielded a positive predictive value and diagnostic accuracy >85% in all HBV genotypes, except genotype H or F, with values of 62.5% and 72.7%, respectively, for the two parameters. CONCLUSIONS HBsAg levels varied across genotypes in HBeAg-negative patients. HBsAg levels <3 logIU/mL were only useful for identifying genotype D inactive carriers. A single HBcrAg measurement ≤3 logU/mL plus HBV DNA ≤2000 IU/mL was highly accurate for identifying inactive carriers, regardless of their HBV genotype.
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Affiliation(s)
- M Riveiro-Barciela
- Liver Unit, Department of Internal Medicine, Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain.
| | - M Bes
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain; Transfusion Safety Laboratory, Banc de Sang i Teixits, Servei Català de la Salut, Barcelona, Spain
| | - F Rodríguez-Frías
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain; Liver Pathology Unit, Departments of Biochemistry and Microbiology (Virology Unit) Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain
| | - D Tabernero
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain; Liver Pathology Unit, Departments of Biochemistry and Microbiology (Virology Unit) Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain
| | - A Ruiz
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain; Liver Pathology Unit, Departments of Biochemistry and Microbiology (Virology Unit) Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain
| | - R Casillas
- Vall d'Hebron Institut de Recerca, Barcelona, Spain
| | - J Vidal-González
- Liver Unit, Department of Internal Medicine, Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain
| | - M Homs
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain; Liver Pathology Unit, Departments of Biochemistry and Microbiology (Virology Unit) Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain
| | - L Nieto
- Liver Pathology Unit, Departments of Biochemistry and Microbiology (Virology Unit) Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain
| | - S Sauleda
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain; Transfusion Safety Laboratory, Banc de Sang i Teixits, Servei Català de la Salut, Barcelona, Spain
| | - R Esteban
- Liver Unit, Department of Internal Medicine, Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain
| | - M Buti
- Liver Unit, Department of Internal Medicine, Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain
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Hodille E, Cuerq C, Badiou C, Bienvenu F, Steghens JP, Cartier R, Bes M, Tristan A, Plesa A, Le VTM, Diep BA, Lina G, Dumitrescu O. Delta Hemolysin and Phenol-Soluble Modulins, but Not Alpha Hemolysin or Panton-Valentine Leukocidin, Induce Mast Cell Activation. Front Cell Infect Microbiol 2016; 6:180. [PMID: 28018862 PMCID: PMC5149515 DOI: 10.3389/fcimb.2016.00180] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 11/24/2016] [Indexed: 11/13/2022] Open
Abstract
Mast cells are located at host interfaces, such as the skin, and contribute to the first-line defense against pathogens by releasing soluble mediators, including those that induce itching and scratching behavior. Here, we show that delta-hemolysin (Hld) and phenol soluble modulins (PSMs) PSMα1 and PSMα3, but not alpha-hemolysin (Hla) or Panton-Valentine leukocidin (PVL), induce dose-dependent tryptase, and lactate dehydrogenase (LDH) release by the HMC-1 human mast cell line. Using supernatants from isogenic strains, we verified that tryptase and LDH release was Hld- and PSMα-dependent. PSMα1 and Hld production was detected in 65 and 17% of human Staphylococcus aureus-infected skin abscess specimens, respectively, but they were produced in vitro by all clinical isolates. The results suggest that Hld and PSM-α1 produced in vivo during S. aureus skin infections induce the release of mast cell mediators responsible for itching and scratching behavior, which may enhance skin to skin transmission of S. aureus via the hands. As Hld and PSMs are upregulated by accessory gene regulator (agr), their association may contribute to the elective transmission of S. aureus strains with a functional agr system.
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Affiliation(s)
- Elisabeth Hodille
- Centre International de Recherche en Infectiologie, Institut National de la Santé et de la Recherche Médicale U1111, Université Lyon 1, Centre National de la Recherche Scientifique UMR5308, Ecole Normale Supérieure de LyonLyon, France; Hospices Civils de LyonLyon, France
| | - Charlotte Cuerq
- Hospices Civils de LyonLyon, France; Laboratoire de Biochimie, Centre de Biologie SudLyon, France
| | - Cédric Badiou
- Centre International de Recherche en Infectiologie, Institut National de la Santé et de la Recherche Médicale U1111, Université Lyon 1, Centre National de la Recherche Scientifique UMR5308, Ecole Normale Supérieure de Lyon Lyon, France
| | - Françoise Bienvenu
- Hospices Civils de LyonLyon, France; Laboratoire d'Immunologie, Centre de Biologie SudLyon, France
| | - Jean-Paul Steghens
- Hospices Civils de LyonLyon, France; Laboratoire de Biochimie, Centre de Biologie SudLyon, France
| | - Régine Cartier
- Hospices Civils de LyonLyon, France; Laboratoire de Biochimie, Groupement Hospitalier EstLyon, France
| | - Michèle Bes
- Centre International de Recherche en Infectiologie, Institut National de la Santé et de la Recherche Médicale U1111, Université Lyon 1, Centre National de la Recherche Scientifique UMR5308, Ecole Normale Supérieure de LyonLyon, France; Hospices Civils de LyonLyon, France; Centre National de Référence des StaphylocoquesBron, France
| | - Anne Tristan
- Centre International de Recherche en Infectiologie, Institut National de la Santé et de la Recherche Médicale U1111, Université Lyon 1, Centre National de la Recherche Scientifique UMR5308, Ecole Normale Supérieure de LyonLyon, France; Hospices Civils de LyonLyon, France; Centre National de Référence des StaphylocoquesBron, France
| | - Adriana Plesa
- Hospices Civils de LyonLyon, France; Laboratoire d'hématologie, Centre de Biologie SudLyon, France
| | - Vien T M Le
- Division of HIV, Infectious Diseases and Global Medicine, Department of Medicine, University of California San Francisco, CA, USA
| | - Binh A Diep
- Division of HIV, Infectious Diseases and Global Medicine, Department of Medicine, University of California San Francisco, CA, USA
| | - Gérard Lina
- Centre International de Recherche en Infectiologie, Institut National de la Santé et de la Recherche Médicale U1111, Université Lyon 1, Centre National de la Recherche Scientifique UMR5308, Ecole Normale Supérieure de LyonLyon, France; Hospices Civils de LyonLyon, France; Centre National de Référence des StaphylocoquesBron, France
| | - Oana Dumitrescu
- Centre International de Recherche en Infectiologie, Institut National de la Santé et de la Recherche Médicale U1111, Université Lyon 1, Centre National de la Recherche Scientifique UMR5308, Ecole Normale Supérieure de LyonLyon, France; Hospices Civils de LyonLyon, France; Centre National de Référence des StaphylocoquesBron, France
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Hodille E, Delouere L, Bouveyron C, Meugnier H, Bes M, Tristan A, Laurent F, Vandenesch F, Lina G, Dumitrescu O. In vitro activity of ceftobiprole on 440 Staphylococcus aureus strains isolated from bronchopulmonary infections. Med Mal Infect 2016; 47:152-157. [PMID: 27856079 DOI: 10.1016/j.medmal.2016.10.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 10/11/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVE We assessed the in vitro activity of ceftobiprole on 440 Staphylococcus aureus clinical strains isolated from bronchopulmonary infections (2010-2014). METHODS S. aureus isolates were characterized for methicillin resistance, PVL status, and clonal complex. All isolates were tested for minimal inhibitory concentrations (MIC) determination by broth microdilution method for ceftobiprole, ceftaroline fosamil, and comparator antibiotics (linezolid, tigecycline, vancomycin, and daptomycin). RESULTS A total of 325 (74%) strains were methicillin-susceptible S. aureus (MSSA) and 115 (26%) were methicillin-resistant S. aureus (MRSA); 105 (24%) S. aureus strains were PVL-positive, including 35.2% (37/105) MRSA and 64.8% (68/105) MSSA. Ceftobiprole was highly active against S. aureus with MIC90 of 1 mg/L, MICs ranging between 0.12 and 4mg/L (only one resistant strain, MIC of 4 mg/L). MIC50 and MIC90 were twice lower in MSSA than MRSA. Moreover, PVL+ MRSA were slightly more susceptible to ceftobiprole (MIC50 of 0.5 mg/L and MIC90 of 1 mg/L) than PVL- MRSA (MIC50 and MIC90 of 1 mg/L). The ceftobiprole-resistant strain was also resistant to ceftaroline fosamil and presented the D239L mutation in PBP2A. The comparator antibiotics were equally active on the strains tested, with MIC90 of 0.5 mg/L for ceftaroline fosamil, tigecycline, and daptomycin; 1 mg/L for vancomycin; and 2 mg/L for linezolid. CONCLUSIONS Our results suggest that ceftobiprole is highly active against S. aureus and is an effective alternative to vancomycin or linezolid in the management of staphylococcal pneumonia. However, close monitoring of isolates should be maintained to prevent resistant strain diffusion.
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Affiliation(s)
- E Hodille
- Centre de référence des staphylocoques, institut des agents infectieux, hospices civils de Lyon, 69495 Lyon, France; International Center for Infectiology Research, 69007 Lyon, France; CNRS UMR5308, Inserm U1111, École normale supérieure de Lyon, université Lyon 1, 69495 Lyon, France.
| | - L Delouere
- Centre de référence des staphylocoques, institut des agents infectieux, hospices civils de Lyon, 69495 Lyon, France
| | - C Bouveyron
- Centre de référence des staphylocoques, institut des agents infectieux, hospices civils de Lyon, 69495 Lyon, France
| | - H Meugnier
- Centre de référence des staphylocoques, institut des agents infectieux, hospices civils de Lyon, 69495 Lyon, France
| | - M Bes
- Centre de référence des staphylocoques, institut des agents infectieux, hospices civils de Lyon, 69495 Lyon, France; International Center for Infectiology Research, 69007 Lyon, France; CNRS UMR5308, Inserm U1111, École normale supérieure de Lyon, université Lyon 1, 69495 Lyon, France
| | - A Tristan
- Centre de référence des staphylocoques, institut des agents infectieux, hospices civils de Lyon, 69495 Lyon, France; International Center for Infectiology Research, 69007 Lyon, France; CNRS UMR5308, Inserm U1111, École normale supérieure de Lyon, université Lyon 1, 69495 Lyon, France
| | - F Laurent
- Centre de référence des staphylocoques, institut des agents infectieux, hospices civils de Lyon, 69495 Lyon, France; International Center for Infectiology Research, 69007 Lyon, France; CNRS UMR5308, Inserm U1111, École normale supérieure de Lyon, université Lyon 1, 69495 Lyon, France
| | - F Vandenesch
- Centre de référence des staphylocoques, institut des agents infectieux, hospices civils de Lyon, 69495 Lyon, France; International Center for Infectiology Research, 69007 Lyon, France; CNRS UMR5308, Inserm U1111, École normale supérieure de Lyon, université Lyon 1, 69495 Lyon, France
| | - G Lina
- Centre de référence des staphylocoques, institut des agents infectieux, hospices civils de Lyon, 69495 Lyon, France; International Center for Infectiology Research, 69007 Lyon, France; CNRS UMR5308, Inserm U1111, École normale supérieure de Lyon, université Lyon 1, 69495 Lyon, France
| | - O Dumitrescu
- Centre de référence des staphylocoques, institut des agents infectieux, hospices civils de Lyon, 69495 Lyon, France; International Center for Infectiology Research, 69007 Lyon, France; CNRS UMR5308, Inserm U1111, École normale supérieure de Lyon, université Lyon 1, 69495 Lyon, France
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Bouchiat C, Curtis S, Spiliopoulou I, Bes M, Cocuzza C, Codita I, Dupieux C, Giormezis N, Kearns A, Laurent F, Molinos S, Musumeci R, Prat C, Saadatian-Elahi M, Tacconelli E, Tristan A, Schulte B, Vandenesch F. MRSA infections among patients in the emergency department: a European multicentre study. J Antimicrob Chemother 2016; 72:372-375. [PMID: 27798212 DOI: 10.1093/jac/dkw431] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/09/2016] [Accepted: 09/13/2016] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND MRSA is a therapeutic concern worldwide, and a major agent of community-acquired skin and soft tissue infections (CA-SSTIs). While the US epidemiology of MRSA in CA-SSTIs is well described and reports the high prevalence of the USA300 clone, data on the European situation are lacking. OBJECTIVES To determine the prevalence and clonal characteristics of MRSA in CA-SSTIs in seven European emergency departments. PATIENTS AND METHODS From April to June 2015, patients presenting to the tertiary hospital emergency department with a Staphylococcus aureus CA-SSTI were prospectively enrolled. S. aureus isolates were characterized by antimicrobial susceptibility testing, detection of Panton-Valentine leucocidin encoding genes and spa-typing, MLST and/or DNA microarray. RESULTS Two-hundred and five cases of S. aureus-associated CA-SSTIs were included, comprising folliculitis, furuncles, abscesses, paronychia, impetigo, carbuncles and cellulitis. Of the 205 cases, we report an MRSA prevalence rate of 15.1%, with a north (0%) to south (29%) increasing gradient. Fifty-one isolates were Panton-Valentine leucocidin-positive (24.9%), whether MSSA or MRSA, with a heterogeneous distribution between countries. Clonal distribution of MSSA and MRSA showed high diversity, with no predominant circulating clone and no archetypical USA300 CA-MRSA clone. CONCLUSIONS This original prospective multicentre study highlights stark differences in European MRSA epidemiology compared with the USA, and that the USA300 CA-MRSA clone is not predominant among community-infected patients in Europe.
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Affiliation(s)
- C Bouchiat
- National Reference Center for Staphylococci, 59 Bd Louis Pinel, 69677 Bron cedex, Lyon, France
| | - S Curtis
- Staphylococcus Reference Service, Public Health England, 61 Colindale Avenue London NW9 5EQ, UK
| | - I Spiliopoulou
- National Reference Laboratory for Staphylococci, University of Patras, University Campus, Rion 26504, Patras, Greece
| | - M Bes
- National Reference Center for Staphylococci, 59 Bd Louis Pinel, 69677 Bron cedex, Lyon, France
| | - C Cocuzza
- Laboratory of Clinical Microbiology and Virology, University of Milano-Bicocca, Via Cadore 48, Monza, Italy
| | - I Codita
- Cantacuzino National Institute of Research, Splaiul Independentei 103, RO-050096 Bucharest, Romania
| | - C Dupieux
- National Reference Center for Staphylococci, 59 Bd Louis Pinel, 69677 Bron cedex, Lyon, France
| | - N Giormezis
- National Reference Laboratory for Staphylococci, University of Patras, University Campus, Rion 26504, Patras, Greece
| | - A Kearns
- Staphylococcus Reference Service, Public Health England, 61 Colindale Avenue London NW9 5EQ, UK
| | - F Laurent
- National Reference Center for Staphylococci, 59 Bd Louis Pinel, 69677 Bron cedex, Lyon, France
| | - S Molinos
- Servei de Microbiologia Hospital Universitari Germans Trias i Pujol, Badalona, Spain.,CIBER Enfermedades Respiratorias. Carretera del Canyet s/n. 08916 Badalona, Spain
| | - R Musumeci
- Laboratory of Clinical Microbiology and Virology, University of Milano-Bicocca, Via Cadore 48, Monza, Italy
| | - C Prat
- Servei de Microbiologia Hospital Universitari Germans Trias i Pujol, Badalona, Spain.,CIBER Enfermedades Respiratorias. Carretera del Canyet s/n. 08916 Badalona, Spain
| | - M Saadatian-Elahi
- Epidemiology unit, Hospices Civils de Lyon, Place d'Arsonval, 69008 Lyon, France
| | - E Tacconelli
- Division of Infectious Diseases, Department of Internal Medicine 1, University Hospital Tuebingen, Geissweg 3, 72076 Tuebingen, Germany
| | - A Tristan
- National Reference Center for Staphylococci, 59 Bd Louis Pinel, 69677 Bron cedex, Lyon, France
| | - B Schulte
- Institut für Mikrobiologie und Infektionsmedizin, University Hospital Tuebingen, Auf der Morgenstelle 28, 72076 Tuebingen, Germany
| | - F Vandenesch
- National Reference Center for Staphylococci, 59 Bd Louis Pinel, 69677 Bron cedex, Lyon, France
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Tasse J, Dupieux C, Caillon J, Lanotte P, Lamy B, Aissa N, Bemer P, Mereghetti L, Michon AL, Lozniewski A, Bes M, Trouillet-Assant S, Laurent F. Rapid bench identification of methicillin-sensitive and methicillin-resistant Staphylococcus aureus: A multicenter comparative evaluation of Alere PBP2a Culture Colony Test (Alere) Versus Slidex MRSA detection (bioMérieux). Diagn Microbiol Infect Dis 2016; 85:419-21. [DOI: 10.1016/j.diagmicrobio.2016.04.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 03/11/2016] [Accepted: 04/10/2016] [Indexed: 10/21/2022]
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Haenni M, Châtre P, Dupieux C, Métayer V, Maillard K, Bes M, Madec JY, Laurent F. mecC-positive MRSA in horses. J Antimicrob Chemother 2015; 70:3401-2. [DOI: 10.1093/jac/dkv278] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bouchiat C, Moreau K, Devillard S, Rasigade JP, Mosnier A, Geissmann T, Bes M, Tristan A, Lina G, Laurent F, Piroth L, Aissa N, Duval X, Le Moing V, Vandenesch F. Staphylococcus aureus infective endocarditis versus bacteremia strains: Subtle genetic differences at stake. Infect Genet Evol 2015; 36:524-530. [PMID: 26318542 DOI: 10.1016/j.meegid.2015.08.029] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 08/03/2015] [Accepted: 08/23/2015] [Indexed: 11/25/2022]
Abstract
Infective endocarditis (IE)((1)) is a severe condition complicating 10-25% of Staphylococcus aureus bacteremia. Although host-related IE risk factors have been identified, the involvement of bacterial features in IE complication is still unclear. We characterized strictly defined IE and bacteremia isolates and searched for discriminant features. S. aureus isolates causing community-acquired, definite native-valve IE (n=72) and bacteremia (n=54) were collected prospectively as part of a French multicenter cohort. Phenotypic traits previously reported or hypothesized to be involved in staphylococcal IE pathogenesis were tested. In parallel, the genotypic profiles of all isolates, obtained by microarray, were analyzed by discriminant analysis of principal components (DAPC)((2)). No significant difference was observed between IE and bacteremia strains, regarding either phenotypic or genotypic univariate analyses. However, the multivariate statistical tool DAPC, applied on microarray data, segregated IE and bacteremia isolates: IE isolates were correctly reassigned as such in 80.6% of the cases (C-statistic 0.83, P<0.001). The performance of this model was confirmed with an independent French collection IE and bacteremia isolates (78.8% reassignment, C-statistic 0.65, P<0.01). Finally, a simple linear discriminant function based on a subset of 8 genetic markers retained valuable performance both in study collection (86.1%, P<0.001) and in the independent validation collection (81.8%, P<0.01). We here show that community-acquired IE and bacteremia S. aureus isolates are genetically distinct based on subtle combinations of genetic markers. This finding provides the proof of concept that bacterial characteristics may contribute to the occurrence of IE in patients with S. aureus bacteremia.
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Affiliation(s)
- Coralie Bouchiat
- Laboratoire de Bactériologie, Centre de Biologie Est, Hospices Civils de Lyon, 59 Boulevard Louis Pinel, 69677 Bron Cedex, France; CIRI, International Center for Infectiology Research, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, 7 rue Guillaume Paradin, 69008 Lyon, France; Centre National de Référence des Staphylocoques, 59 Boulevard Louis Pinel, 69677 Bron Cedex, France
| | - Karen Moreau
- CIRI, International Center for Infectiology Research, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, 7 rue Guillaume Paradin, 69008 Lyon, France
| | - Sébastien Devillard
- Université de Lyon, Université Lyon 1, CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, F-69622 Villeurbanne, France
| | - Jean-Philippe Rasigade
- CIRI, International Center for Infectiology Research, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, 7 rue Guillaume Paradin, 69008 Lyon, France; Centre National de Référence des Staphylocoques, 59 Boulevard Louis Pinel, 69677 Bron Cedex, France
| | - Amandine Mosnier
- CIRI, International Center for Infectiology Research, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, 7 rue Guillaume Paradin, 69008 Lyon, France
| | - Tom Geissmann
- CIRI, International Center for Infectiology Research, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, 7 rue Guillaume Paradin, 69008 Lyon, France
| | - Michèle Bes
- Laboratoire de Bactériologie, Centre de Biologie Est, Hospices Civils de Lyon, 59 Boulevard Louis Pinel, 69677 Bron Cedex, France; CIRI, International Center for Infectiology Research, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, 7 rue Guillaume Paradin, 69008 Lyon, France; Centre National de Référence des Staphylocoques, 59 Boulevard Louis Pinel, 69677 Bron Cedex, France
| | - Anne Tristan
- Laboratoire de Bactériologie, Centre de Biologie Est, Hospices Civils de Lyon, 59 Boulevard Louis Pinel, 69677 Bron Cedex, France; CIRI, International Center for Infectiology Research, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, 7 rue Guillaume Paradin, 69008 Lyon, France; Centre National de Référence des Staphylocoques, 59 Boulevard Louis Pinel, 69677 Bron Cedex, France
| | - Gérard Lina
- CIRI, International Center for Infectiology Research, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, 7 rue Guillaume Paradin, 69008 Lyon, France; Centre National de Référence des Staphylocoques, 59 Boulevard Louis Pinel, 69677 Bron Cedex, France
| | - Frédéric Laurent
- CIRI, International Center for Infectiology Research, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, 7 rue Guillaume Paradin, 69008 Lyon, France; Centre National de Référence des Staphylocoques, 59 Boulevard Louis Pinel, 69677 Bron Cedex, France
| | - Lionel Piroth
- Service de Maladies Infectieuses, CHU de Dijon, 14 rue Gaffarel, 21079 Dijon Cedex, France
| | - Nejla Aissa
- Laboratoire de Bactériologie, CHU de Nancy, 29 avenue du Maréchal de Lattre de Tassigny, 54035 Nancy, France
| | - Xavier Duval
- Centre d'Investigation Clinique, Inserm CIC 1425, IAME, Hôpital Bichat-Claude Bernard, 46 rue Henri Huchard, 75018 Paris, France
| | - Vincent Le Moing
- Service des Maladies Infectieuses et Tropicales, CHU de Montpellier, Hôpital Gui de Chauliac, 34000 Montpellier, France
| | - François Vandenesch
- Laboratoire de Bactériologie, Centre de Biologie Est, Hospices Civils de Lyon, 59 Boulevard Louis Pinel, 69677 Bron Cedex, France; CIRI, International Center for Infectiology Research, Inserm U1111, Université Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR5308, 7 rue Guillaume Paradin, 69008 Lyon, France; Centre National de Référence des Staphylocoques, 59 Boulevard Louis Pinel, 69677 Bron Cedex, France.
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Messad N, Prajsnar TK, Lina G, O'Callaghan D, Foster SJ, Renshaw SA, Skaar EP, Bes M, Dunyach-Remy C, Vandenesch F, Sotto A, Lavigne JP. Existence of a Colonizing Staphylococcus aureus Strain Isolated in Diabetic Foot Ulcers. Diabetes 2015; 64:2991-5. [PMID: 25901094 PMCID: PMC4512213 DOI: 10.2337/db15-0031] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 04/09/2015] [Indexed: 12/17/2022]
Abstract
Staphylococcus aureus is an opportunistic bacterium capable of causing a wide range of severe diseases when it gains access to underlying tissues. Paradoxically, S. aureus is a common inhabitant of the skin microflora and colonizes the nares and other human mucosa. The purpose of this study was to determine the genetic basis for the differences in the pathogenic versus colonizing potential of S. aureus isolated from diabetic foot ulcers (DFUs). By performing optical map comparisons of a collection of S. aureus strains isolated from DFUs, we brought to light a prophage present in noninfecting bacteria. The phage, namely ROSA-like, was localized in a hotspot region ΦNM2 near the locus isd, the iron surface determinant system. The integrated phage significantly reduces the virulence of the strain and increases the biofilm formation. DFUs seem to be a specific niche of this colonizing strain. The ROSA-like phage represents the first description of a mobile element present mainly in S. aureus isolated from DFUs, which modulates the relationship of the bacteria with its human host. This phage appears to attenuate bacterial virulence and promote colonization.
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Affiliation(s)
- Nourreddine Messad
- National Institute of Health and Medical Research, Faculty of Medicine, University of Montpellier, Nîmes, France
| | - Tomasz K Prajsnar
- The Bateson Centre, University of Sheffield, Western Bank, Sheffield, U.K. Krebs Institute, University of Sheffield, Western Bank, Sheffield, U.K
| | - Gerard Lina
- CIRI, International Center for Infectiology Research, LabEx Ecofect, University of Lyon 1, INSERM U1111, Ecole Normale Supérieure de Lyon, CNRS UMR5308, Lyon, France Referent National Center of Staphylococci, Center of Biology and Pathology East, University Hospital Lyon, Bron, France
| | - David O'Callaghan
- National Institute of Health and Medical Research, Faculty of Medicine, University of Montpellier, Nîmes, France
| | - Simon J Foster
- Krebs Institute, University of Sheffield, Western Bank, Sheffield, U.K
| | - Steve A Renshaw
- The Bateson Centre, University of Sheffield, Western Bank, Sheffield, U.K. Krebs Institute, University of Sheffield, Western Bank, Sheffield, U.K
| | - Eric P Skaar
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN
| | - Michèle Bes
- CIRI, International Center for Infectiology Research, LabEx Ecofect, University of Lyon 1, INSERM U1111, Ecole Normale Supérieure de Lyon, CNRS UMR5308, Lyon, France Referent National Center of Staphylococci, Center of Biology and Pathology East, University Hospital Lyon, Bron, France
| | - Catherine Dunyach-Remy
- National Institute of Health and Medical Research, Faculty of Medicine, University of Montpellier, Nîmes, France Department of Microbiology, University Hospital Carémeau, Nîmes, France
| | - François Vandenesch
- CIRI, International Center for Infectiology Research, LabEx Ecofect, University of Lyon 1, INSERM U1111, Ecole Normale Supérieure de Lyon, CNRS UMR5308, Lyon, France Referent National Center of Staphylococci, Center of Biology and Pathology East, University Hospital Lyon, Bron, France
| | - Albert Sotto
- National Institute of Health and Medical Research, Faculty of Medicine, University of Montpellier, Nîmes, France Department of Infectious Diseases, University Hospital Carémeau, Nîmes, France
| | - Jean-Philippe Lavigne
- National Institute of Health and Medical Research, Faculty of Medicine, University of Montpellier, Nîmes, France Department of Microbiology, University Hospital Carémeau, Nîmes, France
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Dupieux C, Blondé R, Bouchiat C, Meugnier H, Bes M, Laurent S, Vandenesch F, Laurent F, Tristan A. Community-acquired infections due to Staphylococcus argenteus lineage isolates harbouring the Panton-Valentine leucocidin, France, 2014. ACTA ACUST UNITED AC 2015; 20. [PMID: 26084314 DOI: 10.2807/1560-7917.es2015.20.23.21154] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We describe two cases of human infections caused by Staphylococcus aureus clonal complex (CC) 75, also called Staphylococcus argenteus, harbouring the Panton-Valentine leucocidin (PVL). These two sporadic cases were community-acquired, and identified in France in 2014. Both had an epidemiological link with Mayotte, an overseas department of France located in the Indian Ocean off the south-eastern African coast. This report illustrates that, contrary to previous descriptions, S. argenteus can acquire important virulence factors and be responsible for severe infections.
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Affiliation(s)
- C Dupieux
- Centre National de Reference des Staphylocoques, Centre de Biologie et de Pathologie Est, Hospices Civils de Lyon, Bron, France
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Vives M, Callejas R, Duque P, Echarri G, Hernandez A, Sabate A, Bes M, Monedero P. Modern hydroxyethyl starch and Acute Kidney Injury after cardiac surgery: a prospective multicenter cohort. J Cardiothorac Vasc Anesth 2015. [DOI: 10.1053/j.jvca.2015.05.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Heraud S, Freydiere AM, Doleans-Jordheim A, Bes M, Tristan A, Vandenesch F, Laurent F, Dauwalder O. Direct Identification of Staphylococcus aureus and Determination of Methicillin Susceptibility From Positive Blood-Culture Bottles in a Bact/ALERT System Using Binax Now S. aureus and PBP2a Tests. Ann Lab Med 2015; 35:454-7. [PMID: 26131419 PMCID: PMC4446586 DOI: 10.3343/alm.2015.35.4.454] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 01/06/2015] [Accepted: 04/25/2015] [Indexed: 01/01/2023] Open
Abstract
Staphylococcus aureus bacteremia is associated with high mortality and morbidity, requiring prompt and appropriate antimicrobial treatment. Therefore, it is important to detect methicillin-resistant S. aureus (MRSA) rapidly from blood cultures. Two immunochromatographic tests, BinaxNow S. aureus and BinaxNow PBP2a, were directly applied to 79 Bact/Alert bottles that were positive for Gram positive cocci in cluster aggregations. Sensitivity and specificity for the identification of S. aureus and determination of methicillin resistance were 94% and 87%, and 100% and 100%, respectively, with less than 30 min of performance time. These tests are efficient and rapid; these tests are valuable alternatives to more sophisticated and expensive methods used in the diagnosis of MRSA bacteremia.
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Affiliation(s)
- Sandrine Heraud
- Hospices Civils de Lyon, Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Est, Bron, France
| | - Anne-Marie Freydiere
- Hospices Civils de Lyon, Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Est, Bron, France. ; Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, Centre de Biologie et de Pathologie Est, Bron, France. ; International Center for Research in Infectiology, INSERM U 1111, Lyon, France. ; Université de Lyon, Faculté de Médecine Lyon Est, Domaine de la Buire, Lyon, France
| | - Anne Doleans-Jordheim
- Hospices Civils de Lyon, Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Est, Bron, France. ; Research group on ≪Bacterial Opportunistic Pathogens and Environment≫, UMR 5557 Ecologie Microbienne, CNRS, Université Lyon 1, ENVL, Université de Lyon, Lyon, France
| | - Michèle Bes
- Hospices Civils de Lyon, Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Est, Bron, France. ; Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, Centre de Biologie et de Pathologie Est, Bron, France. ; International Center for Research in Infectiology, INSERM U 1111, Lyon, France
| | - Anne Tristan
- Hospices Civils de Lyon, Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Est, Bron, France. ; Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, Centre de Biologie et de Pathologie Est, Bron, France. ; International Center for Research in Infectiology, INSERM U 1111, Lyon, France. ; Université de Lyon, Faculté de Médecine Lyon Est, Domaine de la Buire, Lyon, France
| | - François Vandenesch
- Hospices Civils de Lyon, Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Est, Bron, France. ; Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, Centre de Biologie et de Pathologie Est, Bron, France. ; International Center for Research in Infectiology, INSERM U 1111, Lyon, France. ; Université de Lyon, Faculté de Médecine Lyon Est, Domaine de la Buire, Lyon, France
| | - Frederic Laurent
- Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, Centre de Biologie et de Pathologie Est, Bron, France. ; International Center for Research in Infectiology, INSERM U 1111, Lyon, France. ; Université de Lyon, Faculté de Médecine Lyon Est, Domaine de la Buire, Lyon, France. ; Hospices Civils de Lyon, Laboratoire de Bactériologie, Centre de Biologie et Pathologie Nord, Lyon, France
| | - Olivier Dauwalder
- Hospices Civils de Lyon, Laboratoire de Bactériologie, Centre de Biologie et de Pathologie Est, Bron, France. ; Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, Centre de Biologie et de Pathologie Est, Bron, France. ; International Center for Research in Infectiology, INSERM U 1111, Lyon, France. ; Université de Lyon, Faculté de Médecine Lyon Est, Domaine de la Buire, Lyon, France
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Valour F, Rasigade JP, Trouillet-Assant S, Gagnaire J, Bouaziz A, Karsenty J, Lacour C, Bes M, Lustig S, Bénet T, Chidiac C, Etienne J, Vandenesch F, Ferry T, Laurent F. Delta-toxin production deficiency in Staphylococcus aureus: a diagnostic marker of bone and joint infection chronicity linked with osteoblast invasion and biofilm formation. Clin Microbiol Infect 2015; 21:568.e1-11. [PMID: 25677632 DOI: 10.1016/j.cmi.2015.01.026] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 01/21/2015] [Accepted: 01/24/2015] [Indexed: 11/29/2022]
Abstract
Biofilm formation, intra-osteoblastic persistence, small-colony variants (SCVs) and the dysregulation of agr, the major virulence regulon, are possibly involved in staphylococcal bone and joint infection (BJI) pathogenesis. We aimed to investigate the contributions of these mechanisms among a collection of 95 Staphylococcus aureus clinical isolates from 64 acute (67.4%) and 31 chronic (32.6%) first episodes of BJI. The included isolates were compared for internalization rate, cell damage and SCV intracellular emergence using an ex vivo model of human osteoblast infection. Biofilm formation was assessed in a microbead immobilization assay (BioFilm Ring test). Virulence gene profiles were assessed by DNA microarray. Seventeen different clonal complexes were identified among the screened collection. The staphylococcal internalization rate in osteoblasts was significantly higher for chronic than acute BJI isolates, regardless of the genetic background. Conversely, no differences regarding cytotoxicity, SCV emergence, biofilm formation and virulence gene distribution were observed. Additionally, agr dysfunction, detected by the lack of delta-toxin production using whole-cell matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) analysis (n = 15; 15.8%), was significantly associated with BJI chronicity, osteoblast invasion and biofilm formation. These findings provide new insights into MSSA BJI pathogenesis, suggesting the correlation between chronicity and staphylococcal osteoblast invasion. This adaptive mechanism, along with biofilm formation, is associated with agr dysfunction, which can be routinely assessed by delta-toxin detection using MALDI-TOF spectrum analysis, possibly providing clinicians with a diagnostic marker of BJI chronicity at the time of diagnosis.
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Affiliation(s)
- F Valour
- Department of Infectious Diseases, Hospices Civils de Lyon, France; Department of Microbiology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, France; INSERM U1111, International Centre for Infectiology Research, France; Claude Bernard Lyon 1 University, France.
| | - J-P Rasigade
- Department of Microbiology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, France; INSERM U1111, International Centre for Infectiology Research, France; Claude Bernard Lyon 1 University, France
| | | | - J Gagnaire
- Department of Microbiology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, France
| | - A Bouaziz
- Department of Infectious Diseases, Hospices Civils de Lyon, France
| | - J Karsenty
- Department of Infectious Diseases, Hospices Civils de Lyon, France
| | - C Lacour
- Department of Microbiology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, France
| | - M Bes
- Department of Microbiology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, France; INSERM U1111, International Centre for Infectiology Research, France
| | - S Lustig
- INSERM U1111, International Centre for Infectiology Research, France; Claude Bernard Lyon 1 University, France; Orthopaedic Surgery department, Hospices Civils de Lyon, France
| | - T Bénet
- Department of Infection Control and Epidemiology, Hospices Civils de Lyon, Edouard Herriot Hospital, Lyon, France
| | - C Chidiac
- Department of Infectious Diseases, Hospices Civils de Lyon, France; INSERM U1111, International Centre for Infectiology Research, France; Claude Bernard Lyon 1 University, France
| | - J Etienne
- Department of Microbiology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, France; INSERM U1111, International Centre for Infectiology Research, France; Claude Bernard Lyon 1 University, France
| | - F Vandenesch
- Department of Microbiology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, France; INSERM U1111, International Centre for Infectiology Research, France; Claude Bernard Lyon 1 University, France
| | - T Ferry
- Department of Infectious Diseases, Hospices Civils de Lyon, France; INSERM U1111, International Centre for Infectiology Research, France; Claude Bernard Lyon 1 University, France
| | - F Laurent
- Department of Microbiology, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, France; INSERM U1111, International Centre for Infectiology Research, France; Claude Bernard Lyon 1 University, France
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Rasigade JP, Trouillet-Assant S, Breurec S, Antri K, Lina G, Bes M, Tristan A, Badiou C, Bernelin M, Fall C, Ramdani-Bouguessa N, Etienne J, Vandenesch F, Laurent F. The levels of antibodies to Panton-Valentine leukocidin (PVL) vary with PVL prevalence along a north-to-south gradient. Eur J Clin Microbiol Infect Dis 2015; 34:927-33. [PMID: 25575949 DOI: 10.1007/s10096-014-2307-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 12/14/2014] [Indexed: 11/24/2022]
Abstract
Recent research on Staphylococcus aureus vaccine development has focused on active immunization against Panton-Valentine leukocidin (PVL), a potent leukotoxin associated with both superficial and severe deep-seated infections. PVL prevalence is highly variable worldwide, but it is unknown to what extent immunity to PVL varies between patients from geographic areas with different PVL-positive S. aureus prevalences. We conducted a retrospective multicentric study of anti-PVL and anti-alpha-toxin (Hla) antibody levels in uninfected adult patients from France (low PVL prevalence; n = 200), Algeria (moderate prevalence; n = 143), and Senegal (high prevalence; n = 228). The antibody levels were quantified by an enzyme-linked immunosorbent assay (ELISA) procedure. Because Hla is present in virtually all S. aureus strains, its corresponding antibody levels were considered to reflect population exposure to S. aureus. Compared with French participants, the average anti-PVL antibody levels were 2.5-fold and 8.2-fold higher in Algerian and Senegalese participants, respectively (p < 0.001). Conversely, anti-Hla antibody levels did not differ between participants from the three countries, suggesting that the observed differences in anti-PVL antibody levels were not biased by variations in population exposure to S. aureus. Hence, anti-PVL antibody levels in the general populations of France, Algeria, and Senegal vary widely and match variations in PVL-positive S. aureus strain prevalence, with an increasing north-to-south gradient. To conclude, immunity to PVL in a given population correlates with local PVL prevalence. This finding can help to inform PVL vaccine strategies.
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Affiliation(s)
- J-P Rasigade
- CIRI, International Center for Infectiology Research, Université de Lyon, Lyon, France,
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Campos-Varela I, Esteban JI, Bes M, Caralt M, Allende H, Rodríguez-Frías F, Salcedo MT, Sauleda S, Charco R, Guardia J, Esteban R, Castells L. Early predictors of antiviral treatment response in liver transplant recipients with recurrent hepatitis C genotype 1. J Viral Hepat 2014; 21:e118-28. [PMID: 24620835 DOI: 10.1111/jvh.12246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 01/14/2014] [Indexed: 12/09/2022]
Abstract
The success of current antiviral treatment for hepatitis C virus (HCV) recurrence in liver transplant (LT) recipients remains limited. We aimed at evaluating the value of IL28B genotype and early viral kinetics to predict response to standard treatment in the transplant setting. We retrospectively evaluated 104 LT recipients treated for HCV genotype 1 recurrence between 2001 and 2010. Baseline variables, including IL28B genotype, and early viral kinetics were compared among patients who did or did not achieve a sustained virological response (SVR). Logistic regression analyses of candidate variables were conducted to generate a reliable predictive model based on the minimum set of variables. Twenty-nine (28%) achieved an SVR. On multivariate analysis, the magnitude of HCV RNA decline at 4 weeks (OR: 3.74, 95% CI: 1.64-9.39; P = 0.003) and treatment compliance (OR: 35.27, 95% CI: 3.35-365.54; P = 0.003) were the only independent predictors of SVR. Favourable recipient IL28B genotype significantly correlates with virological response at week 4 (OR 3.23; 95% CI, 1.12-9.15; P = 0.03). By logistic regression analysis, a model including donor age, recipient rs12979860 genotype and viral load at 4 weeks showed the best predictive value for SVR with an area under the receiver operating curve of 0.861. Favourable recipient IL28B genotype strongly correlates with the viral response at week 4 which is the strongest predictor of response. The combination of recipient IL28B genotype and donor age with the week 4 response reliably estimates the probability of SVR early on-treatment and may facilitate therapeutic strategies incorporating new antiviral agents.
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Affiliation(s)
- I Campos-Varela
- Liver Unit, Department of Internal Medicine, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain
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Labrousse D, Perret M, Hayez D, Da Silva S, Badiou C, Couzon F, Bes M, Chavanet P, Lina G, Vandenesch F, Croisier-Bertin D, Henry T. Kineret®/IL-1ra blocks the IL-1/IL-8 inflammatory cascade during recombinant Panton Valentine Leukocidin-triggered pneumonia but not during S. aureus infection. PLoS One 2014; 9:e97546. [PMID: 24905099 PMCID: PMC4048174 DOI: 10.1371/journal.pone.0097546] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 04/17/2014] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES Community-acquired Staphylococcus aureus necrotizing pneumonia is a life-threatening disease. Panton Valentine Leukocidin (PVL) has been associated with necrotizing pneumonia. PVL triggers inflammasome activation in human macrophages leading to IL-1β release. IL-1β activates lung epithelial cells to release IL-8. This study aimed to assess the relevance of this inflammatory cascade in vivo and to test the potential of an IL-1 receptor antagonist (IL-1Ra/Kineret) to decrease inflammation-mediated lung injury. METHODS We used the sequential instillation of Heat-killed S. aureus and PVL or S. aureus infection to trigger necrotizing pneumonia in rabbits. In these models, we investigated inflammation in the presence or absence of IL-1Ra/Kineret. RESULTS We demonstrated that the presence of PVL was associated with IL-1β and IL-8 release in the lung. During PVL-mediated sterile pneumonia, Kineret/IL-1Ra reduced IL-8 production indicating the relevance of the PVL/IL-1/IL-8 cascade in vivo and the potential of Kineret/IL-1Ra to reduce lung inflammation. However, Kineret/IL-1Ra was ineffective in blocking IL-8 production during infection with S. aureus. Furthermore, treatment with Kineret increased the bacterial burden in the lung. CONCLUSIONS Our data demonstrate PVL-dependent inflammasome activation during S.aureus pneumonia, indicate that IL-1 signaling controls bacterial burden in the lung and suggest that therapy aimed at targeting this pathway might be deleterious during pneumonia.
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Affiliation(s)
| | - Magali Perret
- Université de Lyon, Lyon, France
- INSERM U1111, Lyon, France
- CNRS, UMR 5308, Lyon, France
- Ecole Normale Supérieure, Lyon, France
| | | | | | - Cédric Badiou
- Université de Lyon, Lyon, France
- INSERM U1111, Lyon, France
- CNRS, UMR 5308, Lyon, France
- Ecole Normale Supérieure, Lyon, France
| | - Florence Couzon
- Université de Lyon, Lyon, France
- INSERM U1111, Lyon, France
- CNRS, UMR 5308, Lyon, France
- Ecole Normale Supérieure, Lyon, France
| | - Michèle Bes
- Université de Lyon, Lyon, France
- INSERM U1111, Lyon, France
- CNRS, UMR 5308, Lyon, France
- Ecole Normale Supérieure, Lyon, France
| | - Pascal Chavanet
- Infectious Diseases Department, University Hospital, Dijon, France
| | - Gérard Lina
- Université de Lyon, Lyon, France
- INSERM U1111, Lyon, France
- CNRS, UMR 5308, Lyon, France
- Ecole Normale Supérieure, Lyon, France
| | - François Vandenesch
- Université de Lyon, Lyon, France
- INSERM U1111, Lyon, France
- CNRS, UMR 5308, Lyon, France
- Ecole Normale Supérieure, Lyon, France
| | | | - Thomas Henry
- Université de Lyon, Lyon, France
- INSERM U1111, Lyon, France
- CNRS, UMR 5308, Lyon, France
- Ecole Normale Supérieure, Lyon, France
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Bouchiat C, Mehenni C, Meugnier H, Bes M, Tristan A, Vandenesch F. Limitations of staphylokinase as a marker for Staplylococcus aureus invasive infections in humans. J Infect Dis 2014; 210:1341-3. [PMID: 24795472 DOI: 10.1093/infdis/jiu246] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Coralie Bouchiat
- CIRI, International Center for Infectiology Research, Université de Lyon Inserm, U1111 Ecole Normale Supérieure de Lyon Université Lyon 1 CNRS, UMR5308 Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, France
| | - Chloé Mehenni
- Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, France
| | - Hélène Meugnier
- CIRI, International Center for Infectiology Research, Université de Lyon Inserm, U1111 Ecole Normale Supérieure de Lyon Université Lyon 1 CNRS, UMR5308 Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, France
| | - Michèle Bes
- CIRI, International Center for Infectiology Research, Université de Lyon Inserm, U1111 Ecole Normale Supérieure de Lyon Université Lyon 1 CNRS, UMR5308 Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, France
| | - Anne Tristan
- CIRI, International Center for Infectiology Research, Université de Lyon Inserm, U1111 Ecole Normale Supérieure de Lyon Université Lyon 1 CNRS, UMR5308 Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, France
| | - François Vandenesch
- CIRI, International Center for Infectiology Research, Université de Lyon Inserm, U1111 Ecole Normale Supérieure de Lyon Université Lyon 1 CNRS, UMR5308 Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, France
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Haenni M, Châtre P, Tasse J, Nowak N, Bes M, Madec JY, Laurent F. Geographical clustering of mecC-positive Staphylococcus aureus from bovine mastitis in France. J Antimicrob Chemother 2014; 69:2292-3. [DOI: 10.1093/jac/dku130] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Saadatian-Elahi M, Tristan A, Laurent F, Rasigade JP, Bouchiat C, Ranc AG, Lina G, Dauwalder O, Etienne J, Bes M, Vandenesch F. Basic rules of hygiene protect health care and lab workers from nasal colonization by Staphylococcus aureus: an international cross-sectional study. PLoS One 2013; 8:e82851. [PMID: 24367562 PMCID: PMC3867406 DOI: 10.1371/journal.pone.0082851] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 10/28/2013] [Indexed: 11/19/2022] Open
Abstract
Acquisition of nasal Staphylococcus aureus (S. aureus) colonization by contaminated hands is likely an important determinant of its nasal carriage rate in health care and lab setting. The objective of our cross-sectional study was to assess the prevalence of nasal methicillin-sensitive (MSSA) or -resistant Staphylococcus aureus (MRSA) carriage among health care professionals (HCPs) attending an international symposium and to study the association between compliance with hygiene rules, individual-related parameters, and medical conditions with nasal S. aureus carriage in this population. After obtaining consent, two nasal swabs were collected. Nasal MSSA and MRSA carriage was measured by the: i) molecular approach targeting spa, mecA and mecA-orfX junction sequences, and ii) culture on selective S. aureus media combined with mecA molecular detection of isolated strains. Information on compliance with hygiene rules, demographic variables, sector of activity and long-term medication was collected by anonymous questionnaire. The participation rate was 32.3%. In total, 176 subjects from 34 countries were included in the analysis. S. aureus was isolated from the nasal swabs of 57 (32.4%) subjects, of whom 3 (5.3%) harbored MRSA strains. Overall, 123 subjects reported working in microbiology laboratories with direct manipulation of S. aureus, and 29 acknowledged regular contacts with patients. In this exposed population, hydro-alcoholic solutions appeared to have a significant protective effect against nasal S. aureus carriage (OR = 0.36; 95% CI: 0.15-0.85). Hospital work was associated with increased risk of nasal S. aureus carriage (OR = 2.38; 95% CI: 1.07-5.29). The results of this study showed that compliance with basic rules of hygiene, such as the use of hydro-alcoholic solutions, could reduce the risk of nasal S. aureus colonization. Hydro-alcoholic solution could interrupt auto-transmission of the pathogen, consequently decreasing the overall nasal carriage rate, specifically in transient carriers.
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Affiliation(s)
- Mitra Saadatian-Elahi
- Centre National de Références des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Anne Tristan
- Centre National de Références des Staphylocoques, Hospices Civils de Lyon, Lyon, France
- Université de Lyon, Institut National de la Santé et de la Recherche Médicale U1111, Lyon, France
| | - Frédéric Laurent
- Centre National de Références des Staphylocoques, Hospices Civils de Lyon, Lyon, France
- Université de Lyon, Institut National de la Santé et de la Recherche Médicale U1111, Lyon, France
| | - Jean-Philippe Rasigade
- Centre National de Références des Staphylocoques, Hospices Civils de Lyon, Lyon, France
- Université de Lyon, Institut National de la Santé et de la Recherche Médicale U1111, Lyon, France
| | - Coralie Bouchiat
- Centre National de Références des Staphylocoques, Hospices Civils de Lyon, Lyon, France
- Université de Lyon, Institut National de la Santé et de la Recherche Médicale U1111, Lyon, France
| | - Anne-Gaëlle Ranc
- Centre National de Références des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Gérard Lina
- Centre National de Références des Staphylocoques, Hospices Civils de Lyon, Lyon, France
- Université de Lyon, Institut National de la Santé et de la Recherche Médicale U1111, Lyon, France
| | - Olivier Dauwalder
- Centre National de Références des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Jérôme Etienne
- Centre National de Références des Staphylocoques, Hospices Civils de Lyon, Lyon, France
- Université de Lyon, Institut National de la Santé et de la Recherche Médicale U1111, Lyon, France
| | - Michèle Bes
- Centre National de Références des Staphylocoques, Hospices Civils de Lyon, Lyon, France
- Université de Lyon, Institut National de la Santé et de la Recherche Médicale U1111, Lyon, France
| | - François Vandenesch
- Centre National de Références des Staphylocoques, Hospices Civils de Lyon, Lyon, France
- Université de Lyon, Institut National de la Santé et de la Recherche Médicale U1111, Lyon, France
- * E-mail:
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Barraud O, Laurent F, Francois B, Bes M, Vignon P, Ploy MC. Severe human bone infection due to methicillin-resistant Staphylococcus aureus carrying the novel mecC variant. J Antimicrob Chemother 2013; 68:2949-50. [DOI: 10.1093/jac/dkt274] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rasigade JP, Trouillet-Assant S, Ferry T, Diep BA, Sapin A, Lhoste Y, Ranfaing J, Badiou C, Benito Y, Bes M, Couzon F, Tigaud S, Lina G, Etienne J, Vandenesch F, Laurent F. PSMs of hypervirulent Staphylococcus aureus act as intracellular toxins that kill infected osteoblasts. PLoS One 2013; 8:e63176. [PMID: 23690994 PMCID: PMC3653922 DOI: 10.1371/journal.pone.0063176] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 03/29/2013] [Indexed: 12/21/2022] Open
Abstract
Epidemic community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) is associated with more severe and acute forms of osteomyelitis than healthcare-associated (HA-) MRSA. Although S. aureus is now recognized as a facultative intracellular pathogen, the contribution of osteoblast invasion by CA-MRSA to the pathogenesis of osteomyelitis is unknown. Using an ex vivo model of intracellular infection of human osteoblasts, we demonstrated that CA-MRSA strains of diverse lineages share an enhanced ability to kill infected osteoblasts compared to HA-MRSA. Cytotoxicity comparisons of CA-MRSA isogenic deletion mutants revealed that phenol-soluble modulins (PSMs), a class of membrane-damaging exoproteins that are expressed at higher levels in CA-MRSA than in HA-MRSA, are involved in this osteoblast killing, whereas other major CA-MRSA virulence determinants, the Panton-Valentine leukocidin and alpha-toxin, are not involved. Similarly, functional agr and sarA regulators, which control the expression of PSMs and alpha-toxin, were required for the expression of the intracellular cytotoxic phenotype by CA-MRSA, whereas the saeRS regulator, which controls the expression of alpha-toxin but not PSMs, had no impact on cytotoxicity. Finally, PSM transcript levels determined by quantitative reverse-transcriptase PCR were significantly higher in CA-MRSA than in HA-MRSA strains and associated with cell damage in MRSA-infected osteoblasts. These findings provide new insights into the pathogenesis of severe CA-MRSA osteomyelitis and unravel a novel virulence strategy of CA-MRSA, based on the invasion and subsequent killing of osteoblasts by PSMs acting as intracellular toxins.
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Affiliation(s)
- Jean-Philippe Rasigade
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1111, University of Lyon, Lyon, France
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Bron, France
- Department of Clinical Microbiology, Northern Hospital Group, Hospices Civils de Lyon, Lyon, France
- * E-mail:
| | - Sophie Trouillet-Assant
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1111, University of Lyon, Lyon, France
| | - Tristan Ferry
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1111, University of Lyon, Lyon, France
| | - Binh An Diep
- Division of Infectious Diseases, Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
| | - Anaïs Sapin
- Department of Clinical Microbiology, Northern Hospital Group, Hospices Civils de Lyon, Lyon, France
| | - Yannick Lhoste
- Department of Clinical Microbiology, Northern Hospital Group, Hospices Civils de Lyon, Lyon, France
| | - Jérémy Ranfaing
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1111, University of Lyon, Lyon, France
| | - Cédric Badiou
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1111, University of Lyon, Lyon, France
| | - Yvonne Benito
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Bron, France
| | - Michèle Bes
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Bron, France
| | - Florence Couzon
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1111, University of Lyon, Lyon, France
| | - Sylvestre Tigaud
- Department of Clinical Microbiology, Northern Hospital Group, Hospices Civils de Lyon, Lyon, France
| | - Gérard Lina
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1111, University of Lyon, Lyon, France
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Bron, France
| | - Jérôme Etienne
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1111, University of Lyon, Lyon, France
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Bron, France
| | - François Vandenesch
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1111, University of Lyon, Lyon, France
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Bron, France
| | - Frédéric Laurent
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1111, University of Lyon, Lyon, France
- National Reference Center for Staphylococci, Hospices Civils de Lyon, Bron, France
- Department of Clinical Microbiology, Northern Hospital Group, Hospices Civils de Lyon, Lyon, France
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Tristan A, Rasigade JP, Ruizendaal E, Laurent F, Bes M, Meugnier H, Lina G, Etienne J, Celard M, Tattevin P, Monecke S, Le Moing V, Vandenesch F. Rise of CC398 lineage of Staphylococcus aureus among Infective endocarditis isolates revealed by two consecutive population-based studies in France. PLoS One 2012; 7:e51172. [PMID: 23272091 PMCID: PMC3521771 DOI: 10.1371/journal.pone.0051172] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2012] [Accepted: 10/30/2012] [Indexed: 11/19/2022] Open
Abstract
Staphylococcus aureus isolates from two prospective studies on infective endocarditis (IE) conducted in 1999 and 2008 and isolated from non-IE bacteremia collected in 2006 were spa-typed and their virulence factors were analyzed with a microarray. Both populations were genetically diverse, with no virulence factors or genotypes significantly more associated with the IE isolates compared with the non-IE isolates. The population structure of the IE isolates did not change much between 1999 and 2008, with the exception of the appearance of CC398 methicillin-susceptible Staphylococcus aureus (MSSA) isolates responsible for 5.6% of all cases in 2008. In 1999, this lineage was responsible for no cases. The increasing prevalence of S. aureus in IE is apparently not the result of a major change in staphylococcal population structure over time, with the exception of the emerging CC398 MSSA lineage.
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Affiliation(s)
- Anne Tristan
- Hospices Civils de Lyon, Centre National de Référence des Staphylocoques, Bron, France.
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Sicot N, Khanafer N, Meyssonnier V, Dumitrescu O, Tristan A, Bes M, Lina G, Vandenesch F, Vanhems P, Etienne J, Gillet Y. Methicillin resistance is not a predictor of severity in community-acquired Staphylococcus aureus necrotizing pneumonia--results of a prospective observational study. Clin Microbiol Infect 2012; 19:E142-8. [PMID: 23237492 DOI: 10.1111/1469-0691.12022] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Staphylococcal necrotizing pneumonia (NP) is a severe disease associated with Panton-Valentine leucocidin (PVL). NP was initially described for methicillin-susceptible Staphylococcus aureus (MSSA) infection, but cases associated with methicillin-resistant S. aureus (MRSA) infection have increased concomitantly with the incidence of community-acquired MRSA worldwide. The role of methicillin resistance in the severity of NP remains controversial. The characteristics and outcomes of 133 patients with PVL-positive S. aureus community-acquired pneumonia (CAP) were compared according to methicillin resistance. Data from patients hospitalized for PVL-positive S. aureus CAP in France from 1986 to 2010 were reported to the National Reference Centre for Staphylococci and were included in the study. The primary end point was mortality. Multivariate logistic modelling and the Cox regression were used for subsequent analyses. We analysed 29 cases of PVL-MRSA and 104 cases of PVL-MSSA pneumonia. Airway haemorrhages were more frequently associated with PVL-MSSA pneumonia. However, no differences in the initial severity or the management were found between these two types of pneumonia. The rate of lethality was 39% regardless of methicillin resistance. By Cox regression analysis, methicillin resistance was not found to be a significant independent predictor of mortality at 7 or 30 days (p 0.65 and p 0.71, respectively). Our study demonstrates that methicillin resistance is not associated with the severity of staphylococcal necrotizing pneumonia.
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Affiliation(s)
- N Sicot
- National Reference Centre for Staphylococci INSERM U851, Faculté de Médecine Lyon Est, Université de Lyon, Lyon, France
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Bes M, Sauleda S, Campos-Varela I, Rodriguez-Frias F, Casamitjana N, Homs M, Piron M, Quer J, Tabernero D, Guardia J, Puig L, Esteban JI. IL28B genetic variation and hepatitis C virus-specific CD4(+) T-cell responses in anti-HCV-positive blood donors. J Viral Hepat 2012; 19:867-71. [PMID: 23121365 DOI: 10.1111/j.1365-2893.2012.01631.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Epidemiological, viral and host factors are associated with the outcome of hepatitis C virus (HCV) infection, and strong host immune responses against HCV favour viral clearance. Recently, genome-wide association studies have shown a strong correlation between single-nucleotide polymorphisms (SNPs) near the interleukin-28B (IL28B) gene and spontaneous or treatment-induced HCV clearance. We have investigated whether protective IL28B genetic variants are associated with HCV-specific T-cell responses among Spanish blood donors. The rs12979860 IL28B haplotype was determined in 69 anti-HCV-positive blood donors (21 HCV RNA negative and 48 HCV RNA positive) and 30 seronegative donors. In all cases, HCV-specific CD4(+) T-cell responses to HCV recombinant proteins (core, NS3 and NS3 helicase) were assessed by ex vivo interferon-γ ELISpot assay. The rs12979860-CC genotype was highly overrepresented in donors with spontaneous HCV clearance when compared to those with chronic infection (76.2%vs 29.2%, P < 0.001; odds ratio, 7.77; 95% confidence interval, 2.4-25.3, P < 0.001). HCV-specific CD4(+) T-cell responses were detected in 16 (76.2%) spontaneous resolvers especially towards nonstructural proteins, but with no correlation with IL28B genotype. Chronic individuals had a significantly lower overall T-cell response again irrespective of IL28B genotype. When spontaneous resolvers and chronic individuals were stratified according to their IL28B genotype, significantly stronger T-cell responses were only observed among those with non-CC haplotypes. Although the protective rs12979860 IL28B CC genotype is associated with spontaneous HCV clearance, stronger CD4(+) T-cell responses towards NS3 were only evident among those with non-CC haplotypes.
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Affiliation(s)
- M Bes
- Transfusion Safety Laboratory, Banc de Sang i Teixits, Servei Català de la Salut, Barcelona, Spain
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Nhan TX, Bes M, Meugnier H, Toko L, Julienne G, Thiolet JM, Tillier C, Tessier S, Baverel J, Conscience B, Lavigne JP, Laurent F, Etienne J, Vandenesch F, Tristan A. ST93-Queensland community-acquired meticillin-resistant Staphylococcus aureus clone in France: outbreak in a scout camp and sporadic cases, July to August 2012. Euro Surveill 2012. [DOI: 10.2807/ese.17.44.20307-en] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We describe the occurrence in France of a Panton-Valentine leukocidin (PVL)-positive meticillin-resistant Staphylococcus aureus (MRSA) ST93 clone, a predominant community-acquired (CA)-MRSA in Australia. In July to August 2012, an outbreak in a scout camp (n=3) and sporadic cases (n=2) of skin and soft tissue infections were reported. Investigations suggested importation of the clone through travel and onward transmission. This illustrates the epidemic potential of this lineage and the role of travellers in the spread of PVL-positive CA-MRSA.
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Affiliation(s)
- T X Nhan
- Institut National de la Santé et de la Recherche Médicale (INSERM) U851, Lyon, France
- Hospices Civils de Lyon, Centre de biologie et de pathologie Est, Laboratoire de Bactériologie, Bron, France
- Centre National de Référence des Staphylocoques, Centre de biologie et de pathologie Est, Lyon, France
| | - M Bes
- Institut National de la Santé et de la Recherche Médicale (INSERM) U851, Lyon, France
- Centre National de Référence des Staphylocoques, Centre de biologie et de pathologie Est, Lyon, France
- Hospices Civils de Lyon, Centre de biologie et de pathologie Est, Laboratoire de Bactériologie, Bron, France
| | - H Meugnier
- Hospices Civils de Lyon, Centre de biologie et de pathologie Est, Laboratoire de Bactériologie, Bron, France
- Centre National de Référence des Staphylocoques, Centre de biologie et de pathologie Est, Lyon, France
- Institut National de la Santé et de la Recherche Médicale (INSERM) U851, Lyon, France
| | - L Toko
- Centre Hospitalier Belfort-Montbéliard, Service des Maladies Infectieuses, Belfort, France
| | - G Julienne
- Centre Hospitalier Belfort-Montbéliard, Laboratoire de Microbiologie, Belfort, France
| | - J M Thiolet
- French Institute for Public Health Surveillance (Institut de Veille Sanitaire, InVS), Département des maladies infectieuses, Saint-Maurice, France
| | - C Tillier
- Agence régionale de santé de Bourgogne, Cellule de l' Institut de Veille Sanitaire en Régions Bourgogne et Franche-Comté, Dijon, France
| | - S Tessier
- Agence régionale de santé de Bourgogne, Cellule de l' Institut de Veille Sanitaire en Régions Bourgogne et Franche-Comté, Dijon, France
| | - J Baverel
- Agence régionale de santé de Franche-Comté, Besançon, France
| | - B Conscience
- Agence régionale de santé de Franche-Comté, Besançon, France
| | - J P Lavigne
- Centre Hospitalier Universitaire de Nîmes, Laboratoire de bactériologie, Nîmes, France
| | - F Laurent
- Hospices Civils de Lyon, Centre de biologie nord, Laboratoire de Bactériologie, Lyon, France
- Institut National de la Santé et de la Recherche Médicale (INSERM) U851, Lyon, France
- Centre National de Référence des Staphylocoques, Centre de biologie et de pathologie Est, Lyon, France
| | - J Etienne
- Institut National de la Santé et de la Recherche Médicale (INSERM) U851, Lyon, France
- Hospices Civils de Lyon, Centre de biologie et de pathologie Est, Laboratoire de Bactériologie, Bron, France
- Centre National de Référence des Staphylocoques, Centre de biologie et de pathologie Est, Lyon, France
| | - F Vandenesch
- Institut National de la Santé et de la Recherche Médicale (INSERM) U851, Lyon, France
- Hospices Civils de Lyon, Centre de biologie et de pathologie Est, Laboratoire de Bactériologie, Bron, France
- Centre National de Référence des Staphylocoques, Centre de biologie et de pathologie Est, Lyon, France
| | - A Tristan
- Institut National de la Santé et de la Recherche Médicale (INSERM) U851, Lyon, France
- Hospices Civils de Lyon, Centre de biologie et de pathologie Est, Laboratoire de Bactériologie, Bron, France
- Centre National de Référence des Staphylocoques, Centre de biologie et de pathologie Est, Lyon, France
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Nhan TX, Bes M, Meugnier H, Toko L, Julienne G, Thiolet JM, Tillier C, Tessier S, Baverel J, Conscience B, Lavigne J, Laurent F, Etienne J, Vandenesch F, Tristan A. ST93-Queensland community-acquired meticillin-resistant Staphylococcus aureus clone in France: outbreak in a scout camp and sporadic cases, July to August 2012. Euro Surveill 2012; 17:20307. [PMID: 23137485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Affiliation(s)
- T X Nhan
- Centre National de Reference des Staphylocoques, Centre de biologie et de pathologie Est, Lyon, France
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