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Monecke S, Burgold-Voigt S, Braun SD, Diezel C, Liebler-Tenorio EM, Müller E, Nassar R, Reinicke M, Reissig A, Senok A, Ehricht R. Characterisation of PVL-Positive Staphylococcus argenteus from the United Arab Emirates. Antibiotics (Basel) 2024; 13:401. [PMID: 38786130 PMCID: PMC11117363 DOI: 10.3390/antibiotics13050401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 05/25/2024] Open
Abstract
Staphylococcus argenteus is a recently described staphylococcal species that is related to Staphylococcus aureus but lacks the staphyloxanthin operon. It is able to acquire both resistance markers such as the SCCmec elements and mobile genetic elements carrying virulence-associated genes from S. aureus. This includes those encoding the Panton-Valentine leukocidin (PVL), which is associated mainly with severe and/or recurrent staphylococcal skin and soft tissue infections. Here, we describe the genome sequences of two PVL-positive, mecA-negative S. argenteus sequence type (ST) 2250 isolates from the United Arab Emirates in detail. The isolates were found in a dental clinic in the United Arab Emirates (UAE). Both were sequenced using Oxford Nanopore Technology (ONT). This demonstrated the presence of temperate bacteriophages in the staphylococcal genomes, including a PVL prophage. It was essentially identical to the published sequence of phiSa2wa_st78 (GenBank NC_055048), a PVL phage from an Australian S. aureus clonal complex (CC) 88 isolate. Besides the PVL prophage, one isolate carried another prophage and the second isolate carried two additional prophages, whereby the region between these two prophages was inverted. This "flipped" region comprised about 1,083,000 bp, or more than a third of the strain's genome, and it included the PVL prophage. Prophages were induced by Mitomycin C treatment and subjected to transmission electron microscopy (TEM). This yielded, in accordance to the sequencing results, one or, respectively, two distinct populations of icosahedral phages. It also showed prolate phages which presumptively might be identified as the PVL phage. This observation highlights the significance bacteriophages have as agents of horizontal gene transfer as well as the need for monitoring emerging staphylococcal strains, especially in cosmopolitan settings such as the UAE.
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Affiliation(s)
- Stefan Monecke
- Leibniz Institute of Photonic Technology (IPHT), Leibniz Center for Photonics in Infection Research (LPI), 07745 Jena, Germany (A.R.); (R.E.)
- InfectoGnostics Research Campus, 07743 Jena, Germany
| | - Sindy Burgold-Voigt
- Leibniz Institute of Photonic Technology (IPHT), Leibniz Center for Photonics in Infection Research (LPI), 07745 Jena, Germany (A.R.); (R.E.)
- InfectoGnostics Research Campus, 07743 Jena, Germany
| | - Sascha D. Braun
- Leibniz Institute of Photonic Technology (IPHT), Leibniz Center for Photonics in Infection Research (LPI), 07745 Jena, Germany (A.R.); (R.E.)
- InfectoGnostics Research Campus, 07743 Jena, Germany
| | - Celia Diezel
- Leibniz Institute of Photonic Technology (IPHT), Leibniz Center for Photonics in Infection Research (LPI), 07745 Jena, Germany (A.R.); (R.E.)
- InfectoGnostics Research Campus, 07743 Jena, Germany
| | | | - Elke Müller
- Leibniz Institute of Photonic Technology (IPHT), Leibniz Center for Photonics in Infection Research (LPI), 07745 Jena, Germany (A.R.); (R.E.)
- InfectoGnostics Research Campus, 07743 Jena, Germany
| | - Rania Nassar
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates (A.S.)
| | - Martin Reinicke
- Leibniz Institute of Photonic Technology (IPHT), Leibniz Center for Photonics in Infection Research (LPI), 07745 Jena, Germany (A.R.); (R.E.)
- InfectoGnostics Research Campus, 07743 Jena, Germany
| | - Annett Reissig
- Leibniz Institute of Photonic Technology (IPHT), Leibniz Center for Photonics in Infection Research (LPI), 07745 Jena, Germany (A.R.); (R.E.)
- InfectoGnostics Research Campus, 07743 Jena, Germany
| | - Abiola Senok
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates (A.S.)
- School of Dentistry, Cardiff University, Cardiff CF14 4XY, UK
| | - Ralf Ehricht
- Leibniz Institute of Photonic Technology (IPHT), Leibniz Center for Photonics in Infection Research (LPI), 07745 Jena, Germany (A.R.); (R.E.)
- InfectoGnostics Research Campus, 07743 Jena, Germany
- Institute of Physical Chemistry, Friedrich-Schiller University, 07743 Jena, Germany
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Zhan Y, Tang R, Zhang Y, Li X, Fan Y, Wang J, Wang H, Lu Z. Fatal bacteremia caused by Staphylococcus argenteus: A case report. Medicine (Baltimore) 2023; 102:e35866. [PMID: 37986387 PMCID: PMC10659672 DOI: 10.1097/md.0000000000035866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 10/11/2023] [Indexed: 11/22/2023] Open
Abstract
RATIONALE Staphylococcus argenteus (S argenteus) is a novel and emerging species that is part of the Staphylococcus aureus (S aureus) complex. Fatal cases of bloodstream infection caused by S argenteus are rarely reported and should be considered in medical practice. PATIENT CONCERNS A 44-year-old male was admitted to our hospital with reduced appetite, high fever and unconsciousness. Laboratory tests indicated infection, muscle damage, and alkalosis in the patient. Brain computed tomography (CT) demonstrated small hematoma in left frontal lobe with peripheral cerebral edema. Chest CT demonstrating chronic bronchitis, emphysema, and bullae in the right lung. Blood culture was collected on the first day of hospitalization for microbial culture and pathological examination. DIAGNOSIS The isolate from blood culture was identified as S argenteus by MALDI-TOF MS after the patient death. INTERVENTIONS The patient was subjected to empirical antibiotic treatment with piperacillin/tazobactam. OUTCOMES After 48 hours of hospitalization, the patient died after ineffective rescue. LESSONS The patient had long-term heavy drinking and smoking as well as chronic malnutrition, which may account for his immune deficiency. The immunocompromised people are more vulnerable to infection by S argenteus and then develop bacteremia. The use of piperacillin/tazobactam may have contributed to the patient death.
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Affiliation(s)
- Yu Zhan
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ruizhi Tang
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yingmiao Zhang
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xun Li
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yue Fan
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Wang
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hui Wang
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhongxin Lu
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Cancer Research Institute of Wuhan, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Hirai J, Suzuki H, Sakanashi D, Kuge Y, Kishino T, Asai N, Hagihara M, Mikamo H. The First Case Report of Community-Acquired Infective Endocarditis Due to Sequence Type 1223 Staphylococcus argenteus Complicated with Convexity Subarachnoid Hemorrhage. Infect Drug Resist 2022; 15:4963-4970. [PMID: 36060234 PMCID: PMC9438795 DOI: 10.2147/idr.s373352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 08/15/2022] [Indexed: 11/23/2022] Open
Affiliation(s)
- Jun Hirai
- Department of Clinical Infectious Diseases, Aichi Medical University Hospital, Nagakute, Aichi, Japan
- Department of Infection Control and Prevention, Aichi Medical University Hospital, Nagakute, Aichi, Japan
- Correspondence: Jun Hirai, Department of Clinical Infectious Diseases, Aichi Medical University Hospital, 1-1, Yazako-karimata, Nagakute, Aichi, 480-1195, Japan, Tel +81-561-62-3311, Fax +81-561-76-2673, Email
| | - Hiroyuki Suzuki
- Department of Neurology, Aichi Medical University, Nagakute, Aichi, Japan
| | - Daisuke Sakanashi
- Department of Infection Control and Prevention, Aichi Medical University Hospital, Nagakute, Aichi, Japan
| | - Yuji Kuge
- Department of Emergency and Critical Care Medicine, Aichi Medical University Hospital, Nagakute, Aichi, Japan
| | - Takaaki Kishino
- Department of Emergency and Critical Care Medicine, Aichi Medical University Hospital, Nagakute, Aichi, Japan
| | - Nobuhiro Asai
- Department of Clinical Infectious Diseases, Aichi Medical University Hospital, Nagakute, Aichi, Japan
- Department of Infection Control and Prevention, Aichi Medical University Hospital, Nagakute, Aichi, Japan
| | - Mao Hagihara
- Department of Molecular Epidemiology and Biomedical Sciences, Aichi Medical University, Nagakute, Aichi, Japan
| | - Hiroshige Mikamo
- Department of Clinical Infectious Diseases, Aichi Medical University Hospital, Nagakute, Aichi, Japan
- Department of Infection Control and Prevention, Aichi Medical University Hospital, Nagakute, Aichi, Japan
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Monecke S, Schaumburg F, Shittu AO, Schwarz S, Mühldorfer K, Brandt C, Braun SD, Collatz M, Diezel C, Gawlik D, Hanke D, Hotzel H, Müller E, Reinicke M, Feßler AT, Ehricht R. Description of Staphylococcal Strains from Straw-Coloured Fruit Bat (Eidolon helvum) and Diamond Firetail (Stagonopleura guttata) and a Review of their Phylogenetic Relationships to Other Staphylococci. Front Cell Infect Microbiol 2022; 12:878137. [PMID: 35646742 PMCID: PMC9132046 DOI: 10.3389/fcimb.2022.878137] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 03/16/2022] [Indexed: 12/30/2022] Open
Abstract
The phylogenetic tree of the Staphylococcus aureus complex consists of several distinct clades and the majority of human and veterinary S. aureus isolates form one large clade. In addition, two divergent clades have recently been described as separate species. One was named Staphylococcus argenteus, due to the lack of the “golden” pigment staphyloxanthin. The second one is S. schweitzeri, found in humans and animals from Central and West Africa. In late 2021, two additional species, S. roterodami and S. singaporensis, have been described from clinical samples from Southeast Asia. In the present study, isolates and their genome sequences from wild Straw-coloured fruit bats (Eidolon helvum) and a Diamond firetail (Stagonopleura guttata, an estrildid finch) kept in a German aviary are described. The isolates possessed staphyloxanthin genes and were closer related to S. argenteus and S. schweitzeri than to S. aureus. Phylogenetic analysis revealed that they were nearly identical to both, S. roterodami and S. singaporensis. We propose considering the study isolates, the recently described S. roterodami and S. singaporensis as well as some Chinese strains with MLST profiles stored in the PubMLST database as different clonal complexes within one new species. According to the principle of priority we propose it should be named S. roterodami. This species is more widespread than previously believed, being observed in West Africa, Southeast Asia and Southern China. It has a zoonotic connection to bats and has been shown to be capable of causing skin and soft tissue infections in humans. It is positive for staphyloxanthin, and it could be mis-identified as S. aureus (or S. argenteus) using routine procedures. However, it can be identified based on distinct MLST alleles, and “S. aureus” sequence types ST2470, ST3135, ST3952, ST3960, ST3961, ST3963, ST3965, ST3980, ST4014, ST4075, ST4076, ST4185, ST4326, ST4569, ST6105, ST6106, ST6107, ST6108, ST6109, ST6999 and ST7342 belong to this species.
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Affiliation(s)
- Stefan Monecke
- Leibniz Institute of Photonic Technology (IPHT), Jena, Germany
- InfectoGnostics Research Campus, Jena, Germany
- *Correspondence: Stefan Monecke,
| | - Frieder Schaumburg
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | - Adebayo O. Shittu
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
- Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Stefan Schwarz
- Institute of Microbiology and Epizootics, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), Freie Universität Berlin, Berlin, Germany
| | - Kristin Mühldorfer
- Department of Wildlife Diseases, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Christian Brandt
- Institute for Infectious Diseases and Infection Control, Jena University Hospital, Jena, Germany
| | - Sascha D. Braun
- Leibniz Institute of Photonic Technology (IPHT), Jena, Germany
- InfectoGnostics Research Campus, Jena, Germany
| | - Maximilian Collatz
- Leibniz Institute of Photonic Technology (IPHT), Jena, Germany
- InfectoGnostics Research Campus, Jena, Germany
| | - Celia Diezel
- Leibniz Institute of Photonic Technology (IPHT), Jena, Germany
- InfectoGnostics Research Campus, Jena, Germany
| | | | - Dennis Hanke
- Institute of Microbiology and Epizootics, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), Freie Universität Berlin, Berlin, Germany
| | - Helmut Hotzel
- Friedrich-Loeffler-Institut (Federal Research Institute for Animal Health), Institute of Bacterial Infections and Zoonoses, Jena, Germany
| | - Elke Müller
- Leibniz Institute of Photonic Technology (IPHT), Jena, Germany
- InfectoGnostics Research Campus, Jena, Germany
| | - Martin Reinicke
- Leibniz Institute of Photonic Technology (IPHT), Jena, Germany
- InfectoGnostics Research Campus, Jena, Germany
| | - Andrea T. Feßler
- Institute of Microbiology and Epizootics, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), Freie Universität Berlin, Berlin, Germany
| | - Ralf Ehricht
- Leibniz Institute of Photonic Technology (IPHT), Jena, Germany
- InfectoGnostics Research Campus, Jena, Germany
- Institute of Physical Chemistry, Friedrich-Schiller-University, Jena, Germany
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Shittu AO, Layer-Nicolaou F, Strommenger B, Nguyen MT, Bletz S, Mellmann A, Schaumburg F. First Report of a Methicillin-Resistant, High-Level Mupirocin-Resistant Staphylococcus argenteus. Front Cell Infect Microbiol 2022; 12:860163. [PMID: 35372120 PMCID: PMC8964999 DOI: 10.3389/fcimb.2022.860163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 02/09/2022] [Indexed: 11/30/2022] Open
Abstract
We describe the identification of a methicillin-resistant, high-level mupirocin-resistant Staphylococcus argenteus. The isolate (1801221) was characterized as t6675-ST2250-SCCmecIVc, and whole-genome sequencing revealed that the isolate possessed two plasmids. One plasmid (34,870 bp), designated p1_1801221 with rep23, harboured the mupirocin resistance (mupA) gene. The second plasmid (20,644 bp), assigned as p2_1801221 with rep5a and rep16, carried the resistance determinants for penicillin (blaZ) and cadmium (cadD). Phylogenetic analysis revealed that the isolate clustered with the European ST2250 lineage. The overall high similarity of both plasmids in S. argenteus with published DNA sequences of Staphylococcus aureus plasmids strongly suggests an interspecies transfer. The pathogenic potential, community and nosocomial spread, and acquisition of antibiotic resistance gene determinants, including the mupA gene by S. argenteus, highlight its clinical significance and the need for its correct identification.
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Affiliation(s)
- Adebayo Osagie Shittu
- Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Nigeria
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
- *Correspondence: Adebayo Osagie Shittu,
| | - Franziska Layer-Nicolaou
- National Reference Centre (NRC) for Staphylococci and Enterococci, Division of Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany
| | - Birgit Strommenger
- National Reference Centre (NRC) for Staphylococci and Enterococci, Division of Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany
| | - Minh-Thu Nguyen
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | - Stefan Bletz
- Institute for Hygiene, University Hospital Münster, Münster, Germany
| | | | - Frieder Schaumburg
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
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Cáceres ME, Ledesma MM, Lombarte Serrat A, Vay C, Sordelli DO, Giacomodonato MN, Buzzola FR. Growth conditions affect biofilms of Staphylococcus aureus producing mastitis: Contribution of MALDI-TOF-MS to strain characterization. CURRENT RESEARCH IN MICROBIAL SCIENCES 2021; 2:100073. [PMID: 34841363 PMCID: PMC8610354 DOI: 10.1016/j.crmicr.2021.100073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 11/29/2022] Open
Abstract
S. aureus native strains formed in vitro high biofilm in milk. Milk whey and free iron medium significantly decreased the biofilms of S. aureus. MALDI-TOF-MS was a useful tool to categorize different levels of biofilm formation.
Bovine mastitis is a disease of dairy cattle prevalent throughout the world that causes alterations in the quality and composition of milk, compromising technological performance. Staphylococcus aureus is one of the most important pathogens that produce clinical, subclinical, and chronic mastitis. Biofilms are considered a virulence factor necessary for the survival of S. aureus in the mammary gland. Its zoonotic potential is important not only for the dairy industry sector but also for public health. This study aimed to evaluate the effect of different growing culture conditions on the biofilm formation of S. aureus isolated from mastitis and to test the MALDI-TOF-MS's ability to discriminate among different biofilm formation levels. Fluids commonly found in the dairy environment were incorporated to approach the pathogen's behavior in natural surroundings. PIA production was also evaluated. All strains were able to form high biofilms in TSB, TSBg, and milk. Milk changed the behavior of some strains which formed more biofilms in this medium than in TSBg. The free iron medium CTSBg and milk whey inhibited the biofilm formation of the most strains. MALDI-TOF-MS performance was an excellent tool to discriminate between high, moderate, and low biofilm producers strains of S. aureus in each media, confirming the results of crystal violet assay. PIA production was variable among the strains and showed a media-dependent behavior. Our data highlights the importance of considering the growing conditions that mimic the natural ones to the study of biofilm formation in vitro.
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Affiliation(s)
- María Emilia Cáceres
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.,Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Martín Manuel Ledesma
- Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Instituto de Fisiopatología y Bioquímica Clínica (INFIBIOC), Universidad de Buenos Aires, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Andrea Lombarte Serrat
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.,Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Carlos Vay
- Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Instituto de Fisiopatología y Bioquímica Clínica (INFIBIOC), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Daniel Oscar Sordelli
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.,Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Mónica Nancy Giacomodonato
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.,Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Fernanda Roxana Buzzola
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.,Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
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7
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Staphylococcus aureus internalization impairs osteoblastic activity and early differentiation process. Sci Rep 2021; 11:17685. [PMID: 34480054 PMCID: PMC8417294 DOI: 10.1038/s41598-021-97246-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 06/07/2021] [Indexed: 11/13/2022] Open
Abstract
Staphylococcus aureus is the most frequent aetiology of bone and joint infections (BJI) and can cause relapsing and chronic infections. One of the main factors involved in the chronicization of staphylococcal BJIs is the internalization of S. aureus into osteoblasts, the bone-forming cells. Previous studies have shown that S. aureus triggers an impairment of osteoblasts function that could contribute to bone loss. However, these studies focused mainly on the extracellular effects of S. aureus. Our study aimed at understanding the intracellular effects of S. aureus on the early osteoblast differentiation process. In our in vitro model of osteoblast lineage infection, we first observed that internalized S. aureus 8325-4 (a reference lab strain) significantly impacted RUNX2 and COL1A1 expression compared to its non-internalized counterpart 8325-4∆fnbAB (with deletion of fnbA and fnbB). Then, in a murine model of osteomyelitis, we reported no significant effect for S. aureus 8325-4 and 8325-4∆fnbAB on bone parameters at 7 days post-infection whereas S. aureus 8325-4 significantly decreased trabecular bone thickness at 14 days post-infection compared to 8325-4∆fnbAB. When challenged with two clinical isogenic strains isolated from initial and relapse phase of the same BJI, significant impairments of bone parameters were observed for both initial and relapse strain, without differences between the two strains. Finally, in our in vitro osteoblast infection model, both clinical strains impacted alkaline phosphatase activity whereas the expression of bone differentiation genes was significantly decreased only after infection with the relapse strain. Globally, we highlighted that S. aureus internalization into osteoblasts is responsible for an impairment of the early differentiation in vitro and that S. aureus impaired bone parameters in vivo in a strain-dependent manner.
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8
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Aung MS, Urushibara N, Kawaguchiya M, Hirose M, Ike M, Ito M, Kobayashi N. Distribution of Virulence Factors and Resistance Determinants in Three Genotypes of Staphylococcus argenteus Clinical Isolates in Japan. Pathogens 2021; 10:pathogens10020163. [PMID: 33546443 PMCID: PMC7913748 DOI: 10.3390/pathogens10020163] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 11/16/2022] Open
Abstract
Staphylococcus argenteus, a novel staphylococcal species independent of S. aureus, causes a wide spectrum of infectious diseases. As detection of this species from humans and animals has been increasingly reported worldwide, its growing virulence and drug resistance via external genetic determinants has become concerning. In this study, the prevalence and genetic characteristics of virulence factors and drug resistance determinants were investigated for 82 S. argenteus clinical isolates in Hokkaido, Japan, for a one-year period starting in August 2019. These S. argenteus isolates corresponded to 0.66% of the total number of S. aureus isolates collected in the same period. The most prevalent genotype was sequence type (ST) 2250 and staphylocoagulase (coa) genotype XId (45.1%, n = 37), followed by ST1223-coa XV (30.5%, n = 25) and ST2198-coa XIV (24.4%, n = 20). Panton-Valentine leukocidin genes (lukS-PV-lukF-PV) were identified in a single ST2250 isolate. Only ST1223 isolates had the enterotoxin gene cluster (egc-2), seb, and selw (detection rate; 100%, 60%, and 84%, respectively), while sec, sey, sel26-sel27, tst-1 were only detected in ST2250 isolates (detection rate; 10.8%, 100%, 67.6%, and 10.8%, respectively). ST2198 isolates harbored selx at a significantly higher rate (60%) than isolates of other STs. Although most of S. argenteus isolates were susceptible to antimicrobials examined, ST2198 showed higher resistance rates to penicillin, macrolides, and aminoglycosides than other STs, and it harbored various resistance genes such as blaZ, erm(C), msr(A), lnuA, and aac(6′)-Ie-aph(2″)-Ia. Only one ST2250 isolate possessed SCCmec-IVc, showing resistance to oxacillin. blaZ was the most prevalent determinant of resistance in the three STs and belonged to two plasmid groups and a chromosomal group, suggesting its diverse origin. lnu(A) in ST2198 isolates was assigned to a major cluster with various staphylococcal species. The present study indicates that the prevalence of virulence factors and drug resistance profile/determinants differ depending on the lineage (ST) of S. argenteus.
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Affiliation(s)
- Meiji Soe Aung
- Department of Hygiene, Sapporo Medical University School of Medicine, Hokkaido, Sapporo 060-8556, Japan; (N.U.); (M.K.); (N.K.)
- Correspondence: ; Tel.: +81-11-611-2111
| | - Noriko Urushibara
- Department of Hygiene, Sapporo Medical University School of Medicine, Hokkaido, Sapporo 060-8556, Japan; (N.U.); (M.K.); (N.K.)
| | - Mitsuyo Kawaguchiya
- Department of Hygiene, Sapporo Medical University School of Medicine, Hokkaido, Sapporo 060-8556, Japan; (N.U.); (M.K.); (N.K.)
| | - Mina Hirose
- Division of Pediatric Dentistry, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu 061-0293, Japan;
| | - Miyo Ike
- Sapporo Clinical Laboratory, Incorporated, Hokkaido, Sapporo 060-0005, Japan; (M.I.); (M.I.)
| | - Masahiko Ito
- Sapporo Clinical Laboratory, Incorporated, Hokkaido, Sapporo 060-0005, Japan; (M.I.); (M.I.)
| | - Nobumichi Kobayashi
- Department of Hygiene, Sapporo Medical University School of Medicine, Hokkaido, Sapporo 060-8556, Japan; (N.U.); (M.K.); (N.K.)
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