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Saei HD, McClure JA, Kashif A, Chen S, Conly JM, Zhang K. The Role of Prophage ϕSa3 in the Adaption of Staphylococcus aureus ST398 Sublineages from Human to Animal Hosts. Antibiotics (Basel) 2024; 13:112. [PMID: 38391498 PMCID: PMC10886223 DOI: 10.3390/antibiotics13020112] [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: 12/23/2023] [Revised: 01/17/2024] [Accepted: 01/21/2024] [Indexed: 02/24/2024] Open
Abstract
Staphylococcus aureus sequence type (ST) 398 is a lineage affecting both humans and livestock worldwide. However, the mechanisms underlying its clonal evolution are still not clearly elucidated. We applied whole-genome sequencing (WGS) typing to 45 S. aureus strains from China and Canada between 2005 and 2014, in order to gain insight into their evolutionary pathway. Based on WGS phylogenetic analysis, 42 isolates were assigned to the human-associated clade (I/II-GOI) and 3 isolates to livestock-associated clade (IIa). Phylogeny of ϕSa3 sequences revealed five phage groups (Groups 1-5), with Group 1 carrying ϕSa3-Group 1 (ϕSa3-G1), Group 2 carrying ϕSa3-G2, Group 3 carrying ϕSa3-G3, Group 4 carrying ϕSa3-G4 and Group 5 lacking ϕSa3. ϕSa3-G1 was only found in strains that accounted for the most ancestral human clade I, while ϕSa3-G2, ϕSa3-G3 and ϕSa3-G4 were found restricted to sublineages within clade II-GOI. Some isolates of clade II-GOI were also found to be ϕSa3-negative or resistant to methicillin which are unusual characteristics for human-adapted isolates. This study demonstrated a strong association between phylogenetic grouping and phage type, suggesting an important role of ϕSa3 prophage in the evolution of human-adapted ST398 subclones. In addition, our results suggest that this subclone slowly began to adapt to animal hosts by losing ϕSa3 and acquiring methicillin resistance, which was observed in some strains of human-associated clade II-GOI, an intermediate human to livestock transmission clade.
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Affiliation(s)
- Habib Dastmalchi Saei
- Department of Pathology & Laboratory Medicine, University of Calgary and Alberta Health Services, Calgary, AB T2N 4N1, Canada
- Department of Microbiology, Faculty of Veterinary Medicine, Urmia University, Urmia 5756151818, Iran
| | - Jo-Ann McClure
- Department of Pathology & Laboratory Medicine, University of Calgary and Alberta Health Services, Calgary, AB T2N 4N1, Canada
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Precision Laboratories/University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Ayesha Kashif
- Department of Pathology & Laboratory Medicine, University of Calgary and Alberta Health Services, Calgary, AB T2N 4N1, Canada
| | - Sidong Chen
- Department of Epidemiology, Public Health College, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - John M Conly
- Department of Pathology & Laboratory Medicine, University of Calgary and Alberta Health Services, Calgary, AB T2N 4N1, Canada
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Precision Laboratories/University of Calgary, Calgary, AB T2N 4N1, Canada
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada
- Department of Medicine, University of Calgary and Alberta Health Services, Calgary, AB T2N 4N1, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary and Alberta Health Services, Calgary, AB T2N 4N1, Canada
| | - Kunyan Zhang
- Department of Pathology & Laboratory Medicine, University of Calgary and Alberta Health Services, Calgary, AB T2N 4N1, Canada
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Precision Laboratories/University of Calgary, Calgary, AB T2N 4N1, Canada
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada
- Department of Medicine, University of Calgary and Alberta Health Services, Calgary, AB T2N 4N1, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary and Alberta Health Services, Calgary, AB T2N 4N1, Canada
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Dendani Chadi Z, Arcangioli MA. Pulsed-Field Gel Electrophoresis Analysis of Bovine Associated Staphylococcus aureus: A Review. Pathogens 2023; 12:966. [PMID: 37513813 PMCID: PMC10385338 DOI: 10.3390/pathogens12070966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/10/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
For decades now, DNA fingerprinting by means of pulsed-field gel electrophoresis (PFGE) continues to be the most widely used to separate large DNA molecules and distinguish between different strains in alternating pulses. This is done by isolating intact chromosomal DNA and using restriction enzymes with specific restriction sites to generate less than 30 restriction fragments from 50 Kb to 10 Mbp. These results make clone-specific band profiles easy to compare. Specialized equipment is required for the optimization of DNA separation and resolution, among which a contour-clamped homogeneous electric field (CHEF) apparatus is the most commonly used. As a result, the PFGE analysis of a bacterial genome provides useful information in terms of epidemiological investigations of different bacterial pathogens. For Staphylococcus aureus subtyping, despite its limitations and the emergence of alternative methods, PFGE analysis has proven to be an adequate choice and the gold standard for determining genetic relatedness, especially in outbreak detection and short-term surveillance in the veterinary field.
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Affiliation(s)
- Zoubida Dendani Chadi
- Laboratory of Biodiversity and Pollution of Ecosystems, Department of Veterinary Medicine, Faculty of Natural Science and Life, University of Chadli Bendjedid, El Tarf 36000, Algeria
| | - Marie-Anne Arcangioli
- VetAgro Sup, Université de Lyon, UMR Mycoplasmoses Animales, 69280 Marcy l'Etoile, France
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Hu J, Chen L, Li G, Pan Y, Lu Y, Chen J, Xiong W, Zeng Z. Prevalence and genetic characteristics of fosB-positive Staphylococcus aureus in duck farms in Guangdong, China in 2020. J Antimicrob Chemother 2023; 78:802-809. [PMID: 36691844 DOI: 10.1093/jac/dkad014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 01/03/2023] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVES To investigate the epidemiology of fosB-positive Staphylococcus aureus in waterfowl farms in the Pearl River tributaries in Guangdong Province, China in 2020. METHODS A total of 63 S. aureus were recovered from 315 samples collected from six duck farms and one goose farm. PFGE, WGS and analysis were performed on 19 fosB-positive S. aureus. RESULTS The fosfomycin resistance rate of the strains was as high as 52.4% (33/63), and 30.1% (19/63) of the strains carried fosB. Resistance gene prediction results showed that duck farm environment-derived strains contained the oxazolidinone drug resistance gene optrA. All fosB-positive S. aureus were MRSA and most of them were MDR, mainly ST9-t899 and ST164-t899. PFGE showed that fosB-positive S. aureus from humans and ducks could be clustered into the same clade. In addition, core-genome SNP analysis showed that clonal transmission of S. aureus occurred between humans and water. Pan-genome analysis showed that S. aureus had an open pangenome. The fosB gene was located on 2610-2615 bp plasmids, which all contained a broad host-range plasmid replication protein family 13. Small plasmids carrying the fosB gene could be found in different multilocus STs of S. aureus. CONCLUSIONS This study indicated that duck farms in Guangdong, China could be an important reservoir of fosB-positive S. aureus. The spread of drug-resistant bacteria in waterfowl farms requires further monitoring.
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Affiliation(s)
- Jianxin Hu
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.,National Risk Assessment Laboratory for Antimicrobial Resistant of Microorganisms in Animals, South China Agricultural University, Guangzhou 510642, China
| | - Lin Chen
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.,National Risk Assessment Laboratory for Antimicrobial Resistant of Microorganisms in Animals, South China Agricultural University, Guangzhou 510642, China
| | - Guihua Li
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.,National Risk Assessment Laboratory for Antimicrobial Resistant of Microorganisms in Animals, South China Agricultural University, Guangzhou 510642, China
| | - Yu Pan
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.,National Risk Assessment Laboratory for Antimicrobial Resistant of Microorganisms in Animals, South China Agricultural University, Guangzhou 510642, China
| | - Yixing Lu
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.,National Risk Assessment Laboratory for Antimicrobial Resistant of Microorganisms in Animals, South China Agricultural University, Guangzhou 510642, China
| | - Jin Chen
- National Risk Assessment Laboratory for Antimicrobial Resistant of Microorganisms in Animals, South China Agricultural University, Guangzhou 510642, China
| | - Wenguang Xiong
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.,National Risk Assessment Laboratory for Antimicrobial Resistant of Microorganisms in Animals, South China Agricultural University, Guangzhou 510642, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Zhenling Zeng
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.,National Risk Assessment Laboratory for Antimicrobial Resistant of Microorganisms in Animals, South China Agricultural University, Guangzhou 510642, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
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Javed S, McClure J, Syed MA, Obasuyi O, Ali S, Tabassum S, Ejaz M, Zhang K. Epidemiology and molecular characterization of Staphylococcus aureus causing bovine mastitis in water buffaloes from the Hazara division of Khyber Pakhtunkhwa, Pakistan. PLoS One 2022; 17:e0268152. [PMID: 35512008 PMCID: PMC9071125 DOI: 10.1371/journal.pone.0268152] [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: 01/28/2022] [Accepted: 04/22/2022] [Indexed: 11/18/2022] Open
Abstract
Buffalo represent a major source of milk in Pakistan. However, production is impacted by the disease bovine mastitis. Mastitis causes significant economic losses, with Staphylococcus aureus (S. aureus) being one of its major causative agents. While much work has been done understanding the epidemiology of bovine mastitis in Pakistan, detailed molecular characterization of the associated S. aureus is unavailable. In the current study both the epidemiological and molecular characterization of S. aureus from bovine mastitis in the Hazara division of Pakistan are examined. S. aureus was isolated from 18.41% of the animals, and left quarters more prone to infection (69.6%) than right quarters (30.4%). Sub-clinical mastitis (75.31%) was more prevalent than clinical mastitis (24.69%), with infections evenly distributed amongst the eight districts. Molecular characterization revealed that only 19.6% of the isolates were methicillin-resistant, and four strains types identified, including ST9-t7867-MSSA, ST9-MSSA, ST101-t2078-MSSA, and ST22-t8934-MRSA-IVa. Antiseptic resistance genes were not detected in the isolates, and low levels of antibiotic resistance were also noted, however the methicillin-resistant strains had higher overall antibiotic resistance. This study represents the most complete molecular typing data for S. aureus causing bovine mastitis in the Hazara district of Pakistan, and the country as a whole.
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Affiliation(s)
- Salma Javed
- Department of Zoology, Hazara University, Mansehra, Pakistan
| | - JoAnn McClure
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Precision Laboratories/University of Calgary, Calgary, Alberta, Canada
| | - Muhammad Ali Syed
- Department of Microbiology, The University of Haripur, Haripur, Pakistan
| | - Osahon Obasuyi
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Shahzad Ali
- Department of Wildlife and Ecology, One Health Research Group, Discipline of Zoology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Sadia Tabassum
- Department of Zoology, Hazara University, Mansehra, Pakistan
| | - Mohammad Ejaz
- Department of Microbiology, The University of Haripur, Haripur, Pakistan
| | - Kunyan Zhang
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Precision Laboratories/University of Calgary, Calgary, Alberta, Canada
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
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Adiguzel MC, Schaefer K, Rodriguez T, Ortiz J, Sahin O. Prevalence, Mechanism, Genetic Diversity, and Cross-Resistance Patterns of Methicillin-Resistant Staphylococcus Isolated from Companion Animal Clinical Samples Submitted to a Veterinary Diagnostic Laboratory in the Midwestern United States. Antibiotics (Basel) 2022; 11:antibiotics11050609. [PMID: 35625253 PMCID: PMC9138002 DOI: 10.3390/antibiotics11050609] [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: 04/07/2022] [Revised: 04/26/2022] [Accepted: 04/28/2022] [Indexed: 12/04/2022] Open
Abstract
Methicillin-resistant Staphylococcus (MRS) is a leading cause of skin and soft tissue infections in companion animals, with limited treatment options available due to the frequent cross-resistance of MRS to other antibiotics. In this study, we report the prevalence, species distribution, genetic diversity, resistance mechanism and cross-resistance patterns of MRS isolated from companion animal (mostly dog and cat) clinical cases submitted to Iowa State University Veterinary Diagnostic Laboratory (ISU VDL) between 2012 and 2019. The majority of isolates were identified as Staphylococcus pseudintermedius (68.3%; 2379/3482) and coagulase-negative Staphylococcus (CoNS) (24.6%; 857/3482), of which 23.9% and 40.5% were phenotypically resistant to methicillin, respectively. Cross resistance to other β-lactams (and to a lesser extent to non-β-lactams) was common in both methicillin-resistant S. pseudintermedius (MRSP) and CoNS (MRCoNS), especially when oxacillin MIC was ≥4 μg/mL (vs. ≥0.5−<4 μg/mL). The PBP2a protein was detected by agglutination in 94.6% (521/551) MRSP and 64.3% (146/227) MRCoNS. A further analysis of 31 PBP2a-negative MRS isolates (all but one MRCoNS) indicated that 11 were mecA gene-positive while 20 were negative for mecA and other mec genes by PCR. The resistance to last-resort anti-staphylococcal human drugs (e.g., tigecycline, linezolid, vancomycin) among the MRS tested was none to very low. Even though genotyping indicated an overall high level of genetic diversity (87 unique PFGE patterns and 20 MLST types) among a subset of MRSP isolates tested (n = 106), certain genotypes were detected from epidemiologically connected cases at the same or different time points, suggesting persistence and/or nosocomial transmission. These results indicate a relatively high prevalence of MRS from companion animals in the Midwestern US; therefore, it is important to perform routine susceptibility testing of Staphylococcus in veterinary clinical settings for the selection of appropriate antimicrobial therapy.
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Affiliation(s)
- Mehmet Cemal Adiguzel
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (M.C.A.); (K.S.); (T.R.); (J.O.)
- Department of Microbiology, Faculty of Veterinary Medicine, Ataturk University, Erzurum 25240, Turkey
| | - Kayla Schaefer
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (M.C.A.); (K.S.); (T.R.); (J.O.)
| | - Trevor Rodriguez
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (M.C.A.); (K.S.); (T.R.); (J.O.)
| | - Jessica Ortiz
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (M.C.A.); (K.S.); (T.R.); (J.O.)
| | - Orhan Sahin
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (M.C.A.); (K.S.); (T.R.); (J.O.)
- Correspondence: ; Tel.: +1-515-294-3861
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Montoya Urrego D, Vanegas JM, Jiménez JN. The remarkable genetic relationship between Staphylococcus aureus isolates from hemodialysis patients and their household contacts: Homes as an important source of colonization and dissemination. PLoS One 2022; 17:e0267276. [PMID: 35439257 PMCID: PMC9017883 DOI: 10.1371/journal.pone.0267276] [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: 01/06/2022] [Accepted: 04/05/2022] [Indexed: 11/18/2022] Open
Abstract
Introduction Staphylococcus aureus is a successful pathogen in hospital and community. Hemodialysis patients have high colonization rates. Interactions between them and their household contacts, are an opportunity to understand the S. aureus colonization between hospitals and community. This study aims to determine the clinical and epidemiological characteristics of S. aureus colonization in hemodialysis patients and their household contacts, as well as the genetic relationship between their isolates. Methods A cross-sectional study was conducted on hemodialysis patients from hospital-associated dialysis center in Medellín-Colombia, and their household contacts between 2019 and 2020. Colonization was assessed in the nostrils for household contacts and nostrils and skin around the catheter insertion for hemodialysis patients. Epidemiological information was obtained, and colonization was evaluated in their pets’ oral cavities. Bacterial identification and susceptibility were assessed using phenotypic and molecular methods. Molecular typing included SCCmec typing, pulsed-field gel electrophoresis (PFGE), spa typing, and virulence factor detection. Results Colonization frequency was 35.6% (n = 16/45) in patients (87.5% MSSA– 12.5% MRSA) and 43.1% (n = 53/123) in household contacts (88.7% MSSA—11.3% MRSA). Of 45 homes, 77.8% presented colonized people. Colonization was detected in at least two household members in 46.7% of homes, of which 52.4% had a genetic relationship. Colonization was 16% (n = 4/25) in pets (75% MRSA—25% MSSA). The most frequent clonal complex was CC8 (15.6%), and the spa typing revealed high diversity. Conclusion This study shows a high frequency of colonization by S. aureus in both hemodialysis patients and their household contacts and a significant genetic relationship between their isolates. This demonstrates an exchange of this bacterium and that homes are an important source of colonization to patients, highlighting the need for prevention strategies outside the hospital to avoid future infections, and the importance of the populations with permanent transit between the two environments.
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Affiliation(s)
- Daniela Montoya Urrego
- Grupo de investigación en Microbiología Básica y aplicada (MICROBA), Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
| | - Johanna M. Vanegas
- Grupo de investigación en Microbiología Básica y aplicada (MICROBA), Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
- Grupo de investigación en Salud Pública, Escuela de Ciencias de la Salud, Universidad Pontificia Bolivariana, Medellín, Colombia
| | - J. Natalia Jiménez
- Grupo de investigación en Microbiología Básica y aplicada (MICROBA), Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
- * E-mail:
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Santos SCL, Saraiva MMS, Moreira Filho ALB, Silva NMV, De Leon CMG, Pascoal LAF, Givisiez PEN, Gebreyes WA, Oliveira CJB. Swine as reservoirs of zoonotic borderline oxacillin-resistant Staphylococcus aureus ST398. Comp Immunol Microbiol Infect Dis 2021; 79:101697. [PMID: 34530296 DOI: 10.1016/j.cimid.2021.101697] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 08/20/2021] [Accepted: 08/23/2021] [Indexed: 11/18/2022]
Abstract
Methicillin resistance mediated by the mecA gene in Staphylococcus aureus, also known as "true MRSA", is typically associated with high oxacillin MIC values (≥8 mg/L). Because non-mecA-mediated oxacillin resistant S. aureus phenotypes can also cause hard-to-treat diseases in humans, their misidentification as methicillin-susceptible S. aureus strains (MSSA) can compromise the efficiency of the antimicrobial therapy. These strains have been refereed as Borderline Oxacillin-Resistant S. aureus (BORSA) but their characterization and role in clinical microbiology have been neglected. Considering the increasing importance of livestock-associated methicillin-resistant S. aureus ST398 (LA-MRSA) as an emerging zoonotic pathogen worldwide, this study aimed to report the genomic context of oxacillin resistance in porcine S. aureus ST398 strains. S. aureus isolates were recovered from asymptomatic pigs from three herds. Oxacillin MIC values ranged from 4 to 32 mg/L. MALDI-TOF-confirmed isolates were screened for mecA and mecC by PCR and genotyped by means of PFGE and Rep-PCR. Seven isolates were whole genome sequenced. None of the isolates harbored the mecA gene or its variants. Although all seven sequenced isolates belonged to one sequence type (ST398), two different spa types (t571 and t1471) were identified. All isolates harbored conserved blaZ gene operon and no mutations on genes encoding for penicillin-binding-proteins were detected. Genes conferring resistance against other drugs such as aminoglycosides, chloramphenicol, macrolide, lincosamide and streptogramin (MLS), tetracycline and trimethoprim were also detected. Isolates also harbored virulence genes encoding for adhesins (icaA; icaB; icaC; icaD; icaR), toxins (hlgA; hlgB; hlgC; luk-PV) and protease (aur). Pigs can serve as reservoirs of non-mecA-mediated oxacillin-resistant ST398 strains potentially pathogenic to humans. Considering that mecA has been the main target to screen methicillin-resistant staphylococci, the occurrence of BORSA phenotypes is probably underestimated in livestock.
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Affiliation(s)
- S C L Santos
- Department of Animal Science, College for Agricultural Sciences, Federal University of Paraiba (UFPB), Rod. PB079 Km12, s/n, 58397-000, Areia, PB, Brazil
| | - M M S Saraiva
- Department of Animal Science, College for Agricultural Sciences, Federal University of Paraiba (UFPB), Rod. PB079 Km12, s/n, 58397-000, Areia, PB, Brazil; Department of Veterinary Pathology, Sao Paulo State University (UNESP), Via de acesso Prof. Paulo Donato Castellane s/n, 14884-900, Jaboticabal, SP, Brazil
| | - A L B Moreira Filho
- Department of Animal Science, College for Agricultural, Social and Human Sciences, Federal University of Paraiba (UFPB), Rua João Pessoa s/n, 58220-000, Bananeiras, PB, Brazil
| | - N M V Silva
- Department of Animal Science, College for Agricultural Sciences, Federal University of Paraiba (UFPB), Rod. PB079 Km12, s/n, 58397-000, Areia, PB, Brazil
| | - C M G De Leon
- Department of Animal Science, College for Agricultural Sciences, Federal University of Paraiba (UFPB), Rod. PB079 Km12, s/n, 58397-000, Areia, PB, Brazil
| | - L A F Pascoal
- Department of Animal Science, College for Agricultural, Social and Human Sciences, Federal University of Paraiba (UFPB), Rua João Pessoa s/n, 58220-000, Bananeiras, PB, Brazil
| | - P E N Givisiez
- Department of Animal Science, College for Agricultural Sciences, Federal University of Paraiba (UFPB), Rod. PB079 Km12, s/n, 58397-000, Areia, PB, Brazil
| | - W A Gebreyes
- Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University (OSU), 43210, Columbus, OH, USA; Global One Health Initiative (GOHi), The Ohio State University, 43210, Columbus, OH, USA
| | - C J B Oliveira
- Department of Animal Science, College for Agricultural Sciences, Federal University of Paraiba (UFPB), Rod. PB079 Km12, s/n, 58397-000, Areia, PB, Brazil; Global One Health Initiative (GOHi), The Ohio State University, 43210, Columbus, OH, USA.
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McClure JA, Lakhundi S, Niazy A, Dong G, Obasuyi O, Gordon P, Chen S, Conly JM, Zhang K. Staphylococcus aureus ST59: Concurrent but Separate Evolution of North American and East Asian Lineages. Front Microbiol 2021; 12:631845. [PMID: 33643261 PMCID: PMC7902796 DOI: 10.3389/fmicb.2021.631845] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 01/20/2021] [Indexed: 11/30/2022] Open
Abstract
Despite initially being described in North America, Staphylococcus aureus (SA) sequence type ST59 is the most commonly isolated sequence type in Eastern Asia. The origins and evolution of this strain type remains unclear and therefore we gathered a collection of ST59 isolates from Canada and mainland China for a detailed genetic analysis of the lineage. Bayesian inference phylogenomic analysis of our isolates, along with previously published ST59 sequences indicated that the lineage could be divided into 6 distinct subgroups (WGS-1 thorough 6), each having distinct molecular characteristics. Analysis also demonstrated the concurrent but separate evolution of North American and East Asian lineages, as well as the extensive diversification of the East Asian lineage. The presence of a mobile element structure (MES) was found to be the major difference between these two continental lineages, absent in all North American isolates, and present in all East Asian ones. Other mobile genetic elements, such as the Immune Evasion Complex (IEC), Panton Valentine Leukocidin (PVL), and Staphylococcal Cassette Chromosome mec (SCCmec), showed significant variability within each sub-group and likely represents local selective pressures rather than major characteristics defining the groups. Our analysis also demonstrated the existence of a more ancient ST59 sub-lineage from North America, which was MES negative and contained some of the earliest reported ST59 isolates. Combined with the existence of a MES negative isolate from Taiwan, predicted to have appeared prior to diversification of the East Asian lineages, these results hint at the possibility of a North American origin for the lineage, which gained hold in Eastern Asia following acquisition of MES, and subsequently diversified.
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Affiliation(s)
- Jo-Ann McClure
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Precision Laboratories/University of Calgary, Calgary, AB, Canada
| | - Sahreena Lakhundi
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB, Canada
| | - Amani Niazy
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB, Canada
| | - George Dong
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB, Canada
| | - Osahon Obasuyi
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB, Canada
| | - Paul Gordon
- Centre for Health Genomics and Informatics, University of Calgary, Calgary, AB, Canada
| | - Sidong Chen
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
| | - John M Conly
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Precision Laboratories/University of Calgary, Calgary, AB, Canada.,Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB, Canada.,Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada.,Department of Medicine, University of Calgary, Calgary, AB, Canada.,The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Kunyan Zhang
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Precision Laboratories/University of Calgary, Calgary, AB, Canada.,Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB, Canada.,Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada.,Department of Medicine, University of Calgary, Calgary, AB, Canada.,The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
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Vanegas JM, Salazar-Ospina L, Roncancio GE, Jiménez JN. Staphylococcus aureus colonization increases the risk of bacteremia in hemodialysis patients: a molecular epidemiology approach with time-dependent analysis. Am J Infect Control 2021; 49:215-223. [PMID: 32485274 DOI: 10.1016/j.ajic.2020.05.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 05/26/2020] [Accepted: 05/26/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Bacteremia is the second cause of death in hemodialysis patients and colonization may be a risk factor. We analyzed the association between Staphylococcus aureus or multidrug-resistant Gram-negative bacteria colonization and bacteremia in hemodialysis patients. METHODS A prospective cohort study was conducted. Colonization status was determined at baseline, 2, and 6 months later. The time-to-first-bacteremia was analyzed using the baseline status and time-dependent nature of colonization. The recurrence of bacteremia given colonization status was evaluated using a Poisson regression model. The genetic relatedness between isolates that colonized and caused bacteremia were established by molecular typing methods. RESULTS Seventy-one patients developed bacteremia over the course of follow-up, with the majority of cases being caused by S aureus (n = 28; 39.4%) and only three caused by multidrug-resistant Gram-negative bacteria. S aureus colonization was associated with an increased risk of bacteremia in time-dependent analysis (HR:4.64; 95%CI: 1.72-12.53) and with recurrence of infection in Poisson model (IRR:5.90, 95%CI: 2.29-15.16). Molecular methods revealed that 77.8% of patients with S aureus bacteremia were colonized with the same strain that caused the infection. CONCLUSIONS S aureus is a cause of endogenous infection in hemodialysis patients. Colonization is associated with both time-to-first-bacteremia and the recurrence of infection. The prompt identification of colonized patients and the evaluation of decolonization protocols are needed.
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Vanegas JM, Salazar-Ospina L, Gallego MA, Jiménez JN. A longitudinal study shows intermittent colonization by Staphylococcus aureus with a high genetic diversity in hemodialysis patients. Int J Med Microbiol 2020; 311:151471. [PMID: 33373839 DOI: 10.1016/j.ijmm.2020.151471] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/29/2020] [Accepted: 12/21/2020] [Indexed: 12/11/2022] Open
Abstract
Staphylococcus aureus colonization increases the risk of invasive infections in different groups of patients. We analyzed the dynamics and factors associated with S. aureus colonization in hemodialysis patients. A longitudinal study was conducted at a dialysis center associated with a tertiary health care institution. S. aureus colonization was assessed three times in nostrils and on the skin and was classified as absent, intermittent or persistent. The molecular analysis included pulsed-field gel electrophoresis (PFGE) and spa-typing. Clonal complex was inferred from spa-typing. A model of generalized estimating equations was performed to determine the factors associated with colonization. A total of 210 patients were included. Colonization by methicillin-susceptible (MSSA) and methicillin-resistant (MRSA) isolates was 29.1 % vs. 4.8 %, 29.2 % vs. 6.7 % and 24.1 % vs. 7.1 % in the first, second and third screenings respectively. Most of the colonized patients were intermittent carriers (77.8 %, n = 63). PFGE and spa-typing revealed a high genetic diversity. One third (33.3 %) of the carriers classified as persistent had different clones during follow-up. Clonal complex 8 was frequent among MSSA (28 %) and MRSA (59 %) isolates. Current smoking (OR:7.22, 95 %CI 2.24-23.27), Charlson index (OR:1.22, 95 %CI 1.03-1.43) and previous infection by S. aureus (OR:2.41; 95 %CI:1.09-5.30) were associated with colonization by this microorganism. Colonization increased the risk of bacteremia (HR = 4.9; 95 % CI: 1.9-12.9). In conclusion, the colonization by S. aureus in hemodialysis patients changes over time and acquisition of new clones is a frequent event. These results evidence that patients are repeatedly recolonizing from hospitals, dialysis units and their homes. On the other hand, factors not associated with healthcare, as smoking, can increase the risk of colonization.
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Affiliation(s)
- Johanna M Vanegas
- Línea de Epidemiología Molecular Bacteriana, Grupo de Investigación en Microbiología Básica y Aplicada, Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
| | - Lorena Salazar-Ospina
- Línea de Epidemiología Molecular Bacteriana, Grupo de Investigación en Microbiología Básica y Aplicada, Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
| | - Marlon A Gallego
- Línea de Epidemiología Molecular Bacteriana, Grupo de Investigación en Microbiología Básica y Aplicada, Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
| | - J Natalia Jiménez
- Línea de Epidemiología Molecular Bacteriana, Grupo de Investigación en Microbiología Básica y Aplicada, Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia.
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11
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Gentile D, Allbaugh RA, Adiguzel MC, Kenne DE, Sahin O, Sebbag L. Bacterial Cross-Contamination in a Veterinary Ophthalmology Setting. Front Vet Sci 2020; 7:571503. [PMID: 33426013 PMCID: PMC7785980 DOI: 10.3389/fvets.2020.571503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 12/07/2020] [Indexed: 12/16/2022] Open
Abstract
The present study describes the prevalence of bacterial cross-contamination in a veterinary ophthalmology setting, a serious issue that can result in healthcare-associated (or nosocomial) infections among patients and staff. Retrospective (n = 5 patients) and prospective (n = 23 patients) studies evaluated bacterial isolates in companion animals presenting with ulcerative keratitis, sampling the patients' cornea and surrounding examination room, including the environment (exam table, countertop, floor) and ophthalmic equipment (slit lamp, transilluminator, direct ophthalmoscope, indirect headset, tonometer). Results of bacterial culture and antibiotic susceptibility testing were recorded, and degree of genetic relatedness was evaluated in six pairs of isolates (cornea + environment or equipment) using pulse-field gel electrophoresis (PFGE). Overall contamination rate of ophthalmic equipment, environment, and examination rooms (equipment + environment) was 42.9% (15/35 samples), 23.7% (9/38 samples) and 32.9% (24/73 samples), respectively. Methicillin-resistant Staphylococcus pseudintermedius (MRSP), a multi-drug resistant (MDR) pathogen with zoonotic potential, was isolated in 8.2% (6/73) of samples. The patient's cornea was likely the source of cross-contamination in 50% (3/6) of MRSP pairs as evaluated by PFGE; notably, two of the three similar bacterial strains did not have an exact match of their antibiotic susceptibility profiles, highlighting the importance of advanced diagnostics such as PFGE to assess cross-contamination in healthcare facilities. Future work could examine the contamination prevalence of specific equipment or the efficacy of cleaning protocols to mitigate cross-contamination in veterinary practice.
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Affiliation(s)
- Dominic Gentile
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Rachel A Allbaugh
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Mehmet C Adiguzel
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States.,Department of Microbiology, Faculty of Veterinary Medicine, Ataturk University, Erzurum, Turkey
| | - Danielle E Kenne
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Orhan Sahin
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Lionel Sebbag
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
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12
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Vanegas JM, Salazar-Ospina L, Montoya-Urrego D, Builes J, Roncancio GE, Jiménez JN. High frequency of colonization by diverse clones of beta-lactam-resistant Gram-negative bacilli in haemodialysis: different sources of transmission outside the renal unit? J Med Microbiol 2020; 69:1132-1144. [PMID: 32812863 DOI: 10.1099/jmm.0.001244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Introduction. While colonization by Staphylococcus aureus in haemodialysis patients has been assessed, knowledge about colonization by beta-lactam-resistant Gram-negative bacilli is still limited.Aim. To describe clinical and molecular characteristics in haemodialysis patients colonized by S. aureus (MSSA-MRSA) and beta-lactam-resistant Gram-negative bacilli in an ambulatory renal unit.Methodology. The study included patients with central venous catheters in an outpatient haemodialysis facility in Medellín, Colombia (October 2017-October 2018). Swab specimens were collected from the nostrils and skin around vascular access to assess colonization by S. aureus (MSSA-MRSA). Stool samples were collected from each patient to evaluate beta-lactam-resistant Gram-negative bacilli colonization. Molecular typing included PFGE, multilocus sequence typing (MLST), spa typing and enterobacterial repetitive intergenic consensus-PCR (ERIC). Clinical information was obtained from medical records and personal interview.Results. A total of 210 patients were included in the study. S. aureus colonization was observed in 33.8 % (n=71) of the patients, 4.8 % (n=10) of which were colonized by methicillin-resistant S. aureus. Stool samples were collected from 165 patients and of these 41.2 % (n=68) and 11.5 % (n=19) were colonized by extended-spectrum-beta-lactamase-producing (ESBL) and carbapenem-resistant bacilli, respectively. Typing methods revealed high genetic diversity among S. aureus and ESBL-producing Gram-negative bacilli (ESBL-GNB). Antibiotic use and hospitalization in the previous 6 months were observed in more than half of the studied population.Conclusion. The high colonization by ESBL-GNB in haemodialysis patients shows evidence for the need for stronger surveillance, not only for S. aureus but also for multidrug-resistant bacilli in order to avoid their spread. Additionally, the high genetic diversity suggests other sources of transmission outside the renal unit instead of horizontal transmission between patients.
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Affiliation(s)
- Johanna M Vanegas
- Línea de Epidemiología Molecular Bacteriana, Grupo de Investigación en Microbiología Básica y Aplicada, Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
| | - Lorena Salazar-Ospina
- Línea de Epidemiología Molecular Bacteriana, Grupo de Investigación en Microbiología Básica y Aplicada, Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
| | - Daniela Montoya-Urrego
- Línea de Epidemiología Molecular Bacteriana, Grupo de Investigación en Microbiología Básica y Aplicada, Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
| | - Julián Builes
- Departamento de Nefrología, Hospital San Vicente Fundación, Medellín, Colombia
| | - Gustavo E Roncancio
- Departamento de Enfermedades Infecciosas, Clínica CardioVID, Medellín, Colombia
- Línea de Epidemiología Molecular Bacteriana, Grupo de Investigación en Microbiología Básica y Aplicada, Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
| | - J Natalia Jiménez
- Línea de Epidemiología Molecular Bacteriana, Grupo de Investigación en Microbiología Básica y Aplicada, Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
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Molecular Characterization and Pathogenicity of Staphylococcus aureus Isolated from Benin-City, Nigeria. Microorganisms 2020; 8:microorganisms8060912. [PMID: 32560236 PMCID: PMC7356805 DOI: 10.3390/microorganisms8060912] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/13/2020] [Accepted: 06/14/2020] [Indexed: 11/16/2022] Open
Abstract
While numerous studies examine the epidemiology and molecular characterization of Staphylococcus aureus in most developed countries, the detailed molecular characterization and molecular epidemiology of S. aureus strains and clones in Africa is lacking. We determined the molecular epidemiology and virulence of 81 non-duplicate isolates of S. aureus from Benin-City, Nigeria, collected during January–July 2016, and compared with global strains. Forty-seven isolates (58.0%) were found to be methicillin-sensitive Staphylococcus aureus (MSSA), while 34 (42.0%) were methicillin-resistant Staphylococcus aureus (MRSA). ST152-MSSA (24.7%) and ST7-MRSA-V (19.8%) were the dominant groups identified, which were not genetically related to global predominant strains, but rather exhibited regional dominance. An interesting finding of the study was the presence of highly related strains in the region, which differed primarily in their methicillin resistance gene carriage, staphylococcal cassette chromosome mec (SCCmec), with 99.4–99.7% relatedness between the genomes of the strains within the MRSA–MSSA pairs. This suggests that the strains within a pair are experiencing gain or loss of SCCmec within local conditions, with evolution continuing to diversify the strains to a small degree. This study represents the most comprehensive genetic and virulence study of S. aureus in Nigeria.
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14
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Blondeau LD, Rubin JE, Deneer H, Kanthan R, Sanche S, Beshard N, Mpofu C, Blondeau JM. Bacteremia with Staphylococcus pseudintermedius in a 4 month old pediatric oncology patient. J Chemother 2020; 32:260-262. [PMID: 32538712 DOI: 10.1080/1120009x.2020.1773627] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Staphylococcus pseudintermedius colonizes and is a pathogen of dogs and is being increasingly recognized from specimens from humans with various infections. We describe a case of S. pseudintermedius bacteremia in a 4 month old pediatric oncology patient with clear evidence of transmission from the family pet.
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Affiliation(s)
| | - Joseph E Rubin
- University of Saskatchewan, Saskatoon, Saskatchewan, Canada.,Veterinary Microbiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Harry Deneer
- University of Saskatchewan, Saskatoon, Saskatchewan, Canada.,Pathology and Laboratory Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Rani Kanthan
- University of Saskatchewan, Saskatoon, Saskatchewan, Canada.,Pathology and Laboratory Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Stephen Sanche
- University of Saskatchewan, Saskatoon, Saskatchewan, Canada.,Division of Clinical Microbiology, Royal University Hospital and Saskatchewan Health Authority.,Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Nicole Beshard
- University of Saskatchewan, Saskatoon, Saskatchewan, Canada.,Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Chris Mpofu
- Division of Pediatric Oncology, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada
| | - Joseph M Blondeau
- University of Saskatchewan, Saskatoon, Saskatchewan, Canada.,Pathology and Laboratory Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.,Division of Clinical Microbiology, Royal University Hospital and Saskatchewan Health Authority.,Departments of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.,Ophthalmology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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15
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Ozmen Capin BB, Tekeli A, Karahan ZC. Evaluation of the Presence and Characterization of Vancomycin-Intermediate and Heterogeneous Vancomycin-Intermediate Level Resistance Among Bloodstream Isolates of Methicillin-Resistant Staphylococcus aureus. Microb Drug Resist 2020; 26:238-244. [PMID: 31545160 DOI: 10.1089/mdr.2019.0178] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Aims: Heterogeneous vancomycin-intermediate Staphylococcus aureus (hVISA) could be misinterpreted as "susceptible" with routine susceptibility testing procedures, and the subpopulations with reduced susceptibility to glycopeptides can lead to therapeutic failure. The aim of this study was to evaluate the presence of VISA and hVISA strains among stocked bloodstream methicillin-resistant S. aureus (MRSA) isolates of 14 years. Materials and Methods: A total of 127 nonduplicate MRSA strains isolated from blood cultures between 2001 and 2014 were investigated. Glycopeptide minimum inhibitory concentration values were detected by microbroth dilution method. Susceptibilities to other antimicrobials were determined by the disk diffusion method and interpreted according to the European Committee on Antimicrobial Susceptibility Testing (EUCAST) criteria. Macrogradient test (MGT) and modified population analysis profile-area under the curve (modified PAP-AUC) methods were used to detect VISA and hVISA. Staphylococcal Cassette Chromosome mec (SCCmec), agr, and toxin gene typing were done by polymerase chain reaction. Genetic relatedness of the strains were evaluated by pulsed-field gel electrophoresis (PFGE). Results: All isolates were susceptible to glycopeptides, linezolid, and quinupristin-dalfopristin. All were resistant to tetracycline, 96% were resistant to aminoglycosides, fluoroquinolones, and rifampin. Only 58.3% of the isolates were susceptible to ceftaroline. Six isolates were suspected as hVISA by the MGT, but none could be confirmed by the modified PAP-AUC analysis. All isolates carried type-III SCCmec, sea was the most prevalent (96.9%) enterotoxin gene and agr group I locus was predominant (93.7%). PFGE analysis revealed four main and four unique patterns. Conclusion: No hVISA or VISA were detected. The resistance rate to ceftaroline seems remarkable due to its recent entry into the market in Turkey.
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Affiliation(s)
- Busra Betul Ozmen Capin
- Department of Medical Microbiology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Alper Tekeli
- Department of Medical Microbiology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Zeynep Ceren Karahan
- Department of Medical Microbiology, Ankara University Faculty of Medicine, Ankara, Turkey
- Central Microbiology Laboratory, Ibn-i Sina Hospital, Ankara, Turkey
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16
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Wu K, Conly J, McClure JA, Kurwa HA, Zhang K. Arginine Catabolic Mobile Element in Evolution and Pathogenicity of the Community-Associated Methicillin-Resistant Staphylococcus aureus Strain USA300. Microorganisms 2020; 8:microorganisms8020275. [PMID: 32085445 PMCID: PMC7074830 DOI: 10.3390/microorganisms8020275] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 02/14/2020] [Indexed: 01/11/2023] Open
Abstract
USA300 is a predominant community-associated methicillin-resistant Staphylococcus aureus strain which carries an arginine catabolic mobile element (ACME). ACME contains potential virulence factors including an arginine deiminase (arc) pathway and an oligopeptide permease (opp-3) system, which are proposed to play a role in bacterial virulence and transmission. However, the role of ACME in evolution and pathogenicity of USA300 remains to be elucidated. ACME and arcA deletion mutants were created by allelic replacement from a USA300 clinical isolate. By comparing wild type and isogenic ACME deletion USA300 strains, ACME was shown not to contribute to bacterial survival on plastic surfaces, and mouse skin surfaces. ACME did not contribute to bacterial virulence in cell invasion and cytotoxicity assays, invertebrate killing assays and a mouse skin infection model. Wild-type ACME negative USA300 clinical isolates showed similar associations with invasive anatomic sites as ACME positive isolates. Our experiments also demonstrated that ACME can spontaneously excise from the bacterial chromosome to generate an ACME deletion strain at a low frequency. Our results do not support that the ACME element alone is a significant factor in the transmission and virulence of USA300 strain, and ACME may have been coincidently incorporated into the genome of USA300.
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Affiliation(s)
- Kaiyu Wu
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AL T2N 4N1, Canada; (K.W.); (J.C.)
| | - John Conly
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AL T2N 4N1, Canada; (K.W.); (J.C.)
- Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, AL T2N 4N1, Canada
- Department of Medicine, University of Calgary, Calgary, AL T2N 4N1, Canada;
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AL T2N 4N1, Canada
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Public Laboratories/University of Calgary, Calgary, AL T2N 4N1, Canada;
| | - Jo-Ann McClure
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Public Laboratories/University of Calgary, Calgary, AL T2N 4N1, Canada;
| | - Habib A. Kurwa
- Department of Medicine, University of Calgary, Calgary, AL T2N 4N1, Canada;
| | - Kunyan Zhang
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AL T2N 4N1, Canada; (K.W.); (J.C.)
- Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, AL T2N 4N1, Canada
- Department of Medicine, University of Calgary, Calgary, AL T2N 4N1, Canada;
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AL T2N 4N1, Canada
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Public Laboratories/University of Calgary, Calgary, AL T2N 4N1, Canada;
- Correspondence: ; Tel.: +1-403-210-8484
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17
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Bernier-Lachance J, Arsenault J, Usongo V, Parent É, Labrie J, Jacques M, Malouin F, Archambault M. Prevalence and characteristics of Livestock-Associated Methicillin-Resistant Staphylococcus aureus (LA-MRSA) isolated from chicken meat in the province of Quebec, Canada. PLoS One 2020; 15:e0227183. [PMID: 31923238 PMCID: PMC6953868 DOI: 10.1371/journal.pone.0227183] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 12/14/2019] [Indexed: 01/12/2023] Open
Abstract
This study was conducted to estimate the prevalence of Livestock-Associated Methicillin-Resistant Staphylococcus aureus (LA-MRSA) in retail chicken meat and broiler chickens from the Province of Quebec, Canada, and to characterize LA-MRSA isolates. A total of 309 chicken drumsticks and thighs were randomly selected in 2013 from 43 retail stores in the Monteregie. In addition, nasal swabs and caeca samples were collected in 2013-2014 from 200 broiler chickens of 38 different flocks. LA-MRSA was not detected in broiler chickens. Fifteen LA-MRSA isolates were recovered from four (1.3%) of the 309 chicken meat samples. Multi-Locus Sequence Typing (MLST) and SCCmec typing revealed two profiles (ST398-MRSA-V and ST8-MRSA-IVa), which were distinct using pulse-field gel electrophoresis (PFGE) and microarray (antimicrobial resistance and virulence genes) analyses. In addition to beta-lactam resistance, tetracycline and spectinomycin resistance was detected in all isolates from the 3 positive samples of the ST398 profile. Southern blot hybridization revealed that the resistance genes aad(D) and lnu(A), encoding resistances to aminoglycosides and lincosamides respectively, were located on plasmid. All isolates were able to produce biofilms, but biofilm production was not correlated with hld gene expression. Our results show the presence of two separate lineages of MRSA in retail chicken meat in Quebec, one of which is likely of human origin.
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Affiliation(s)
- Jocelyn Bernier-Lachance
- Centre de Recherche en Infectiologie Porcine et Aviaire (CRIPA-FRQNT), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
| | - Julie Arsenault
- Centre de Recherche en Infectiologie Porcine et Aviaire (CRIPA-FRQNT), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Groupe de recherche en épidémiologie des zoonoses et santé publique (GREZOSP), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
| | - Valentine Usongo
- Centre de Recherche en Infectiologie Porcine et Aviaire (CRIPA-FRQNT), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
| | - Éric Parent
- Centre de Recherche en Infectiologie Porcine et Aviaire (CRIPA-FRQNT), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
| | - Josée Labrie
- Centre de Recherche en Infectiologie Porcine et Aviaire (CRIPA-FRQNT), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
| | - Mario Jacques
- Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
| | - François Malouin
- Centre de Recherche en Infectiologie Porcine et Aviaire (CRIPA-FRQNT), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Département de biologie, Faculté des sciences, Centre d'Étude et de Valorisation de la Diversité Microbienne (CEVDM), Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Marie Archambault
- Centre de Recherche en Infectiologie Porcine et Aviaire (CRIPA-FRQNT), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- * E-mail:
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Kashif A, McClure JA, Lakhundi S, Pham M, Chen S, Conly JM, Zhang K. Staphylococcus aureus ST398 Virulence Is Associated With Factors Carried on Prophage ϕSa3. Front Microbiol 2019; 10:2219. [PMID: 31608039 PMCID: PMC6771273 DOI: 10.3389/fmicb.2019.02219] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 09/11/2019] [Indexed: 02/01/2023] Open
Abstract
An increasing number of severe infections caused by Staphylococcus aureus ST398 strains has been observed. However, it has not been elucidated whether all ST398 strains are equally virulent. We collected 13 strains from China and Canada to test in a Caenorhabditis elegans infection model and compared their whole genome sequences (WGS) to explore potential insights into their virulence. All isolates belonged to ST398-methicillin-susceptible S. aureus (MSSA) with variant spa types (t034, t571, t1451, t1250). Pulsed field gel electrophoresis (PFGE) and WGS analyses showed that the 13 isolates clustered into 3 genomic types (Types A-C). WGS and prophage phylogenetic analyses also revealed that the strains could be divided into 3 phage groups (Groups 1–3), which correlated with high-, moderate-, and low-nematocidal activities, with mean killing rates of 94, 67, and 40%, respectively. Group 1 carried ϕSa3-Group 1 (ϕSa3-G1), Group 2 carried ϕSa3-G2, and Group 3 lacked ϕSa3. Interestingly, strain GD1706 (that genetically clustered within Type C) and strain GD487 (within Type B) both carried ϕSa3-G1 like phages and killed 92% of the nematodes, similar to the Type A strains carrying ϕSa3-G1. This study demonstrated that different ST398 sub-lineages possess variable virulence capacities, depending on the presence or absence, as well as the structure of the prophage ϕSa3 that carries virulence factors.
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Affiliation(s)
- Ayesha Kashif
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Public Laboratories/University of Calgary, Calgary, AB, Canada
| | - Jo-Ann McClure
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Public Laboratories/University of Calgary, Calgary, AB, Canada
| | - Sahreena Lakhundi
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Public Laboratories/University of Calgary, Calgary, AB, Canada
| | - Michael Pham
- Centre for Antimicrobial Resistance, Alberta Health Services/Alberta Public Laboratories/University of Calgary, Calgary, AB, Canada
| | - Sidong Chen
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
| | - John M Conly
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China.,Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China.,Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China.,Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China.,Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Kunyan Zhang
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China.,Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China.,Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China.,Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China.,Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
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19
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Gill VC, Ma I, Guo M, Gregson DB, Naugler C, Church DL. Sociodemographic and geospatial associations with community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) infections in a large Canadian city: an 11 year retrospective study. BMC Public Health 2019; 19:914. [PMID: 31288765 PMCID: PMC6617829 DOI: 10.1186/s12889-019-7169-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 06/13/2019] [Indexed: 11/10/2022] Open
Abstract
Background The first Canadian outbreak of community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) was identified in 2004 in Calgary, Alberta. Using a novel model of MRSA population-based surveillance, sociodemographic risk associations, yearly geospatial dissemination and prevalence of CA-MRSA infections over an 11 year period was identified in an urban healthcare jurisdiction of Calgary. Methods Positive MRSA case records, patient demographics and laboratory data were obtained from a centralized Laboratory Information System of Calgary Laboratory Services in Calgary, Alberta, Canada between 2004 and 2014. Public census data was obtained from Statistics Canada, which was used to match with laboratory data and mapped using Geographic Information Systems. Results During the study period, 52.5% of positive MRSA infections in Calgary were CA-MRSA cases. The majority were CMRSA10 (USA300) clones (94.1%; n = 4255), while the remaining case (n = 266) were CMRSA7 (USA400) clones. Period prevalence of CMRSA10 increased from 3.6 cases/100000 population in 2004, to 41.3 cases/100000 population in 2014. Geospatial analysis demonstrated wide dissemination of CMRSA10 annually in the city. Those who are English speaking (RR = 0.05, p < 0.0001), identify as visible minority Chinese (RR = 0.09, p = 0.0023) or visible minority South Asian (RR = 0.25, p = 0.015), and have a high median household income (RR = 0.27, p < 0.0001) have a significantly decreased relative risk of CMRSA10 infections. Conclusions CMRSA10 prevalence increased between 2004 and 2007, followed by a stabilization of cases by 2014. Certain sociodemographic factors were protective from CMRSA10 infections. The model of MRSA population-surveillance and geomap outbreak events can be used to track the epidemiology of MRSA in any jurisdiction. Electronic supplementary material The online version of this article (10.1186/s12889-019-7169-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Victoria C Gill
- London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Irene Ma
- Department of Pathology and Laboratory Medicine Cumming School of Medicine, University of Calgary, 3535 Research Rd NW, Calgary, Alberta, T2L 2K8, Canada
| | - Maggie Guo
- Department of Pathology and Laboratory Medicine Cumming School of Medicine, University of Calgary, 3535 Research Rd NW, Calgary, Alberta, T2L 2K8, Canada.,Alberta Public Laboratories, 3535 Research Road NW, Calgary, Alberta, T2L 2K8, Canada
| | - Dan B Gregson
- Department of Pathology and Laboratory Medicine Cumming School of Medicine, University of Calgary, 3535 Research Rd NW, Calgary, Alberta, T2L 2K8, Canada.,Department of Medicine, Cumming School of Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, T2N 4N1, Canada.,Alberta Public Laboratories, 3535 Research Road NW, Calgary, Alberta, T2L 2K8, Canada
| | - Christopher Naugler
- Department of Pathology and Laboratory Medicine Cumming School of Medicine, University of Calgary, 3535 Research Rd NW, Calgary, Alberta, T2L 2K8, Canada.,Department of Family Medicne, Cumming School of Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, T2N 4N1, Canada.,Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, T2N 4N1, Canada.,Alberta Public Laboratories, 3535 Research Road NW, Calgary, Alberta, T2L 2K8, Canada
| | - Deirdre L Church
- Department of Pathology and Laboratory Medicine Cumming School of Medicine, University of Calgary, 3535 Research Rd NW, Calgary, Alberta, T2L 2K8, Canada. .,Department of Medicine, Cumming School of Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, T2N 4N1, Canada. .,Alberta Public Laboratories, 3535 Research Road NW, Calgary, Alberta, T2L 2K8, Canada.
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20
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Neoh HM, Tan XE, Sapri HF, Tan TL. Pulsed-field gel electrophoresis (PFGE): A review of the "gold standard" for bacteria typing and current alternatives. INFECTION GENETICS AND EVOLUTION 2019; 74:103935. [PMID: 31233781 DOI: 10.1016/j.meegid.2019.103935] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 06/18/2019] [Accepted: 06/20/2019] [Indexed: 12/01/2022]
Abstract
Pulsed-field gel electrophoresis (PFGE) is considered the "gold standard" for bacteria typing. The method involves enzyme restriction of bacteria DNA, separation of the restricted DNA bands using a pulsed-field electrophoresis chamber, followed by clonal assignment of bacteria based on PFGE banding patterns. Various PFGE protocols have been developed for typing different bacteria, leading it to be one of the most widely used methods for phylogenetic studies, food safety surveillance, infection control and outbreak investigations. On the other hand, as PFGE is lengthy and labourious, several PCR-based typing methods can be used as alternatives for research purposes. Recently, matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS) and whole genome sequencing (WGS) have also been proposed for bacteria typing. In fact, as WGS provides more information, such as antimicrobial resistance and virulence of the tested bacteria in comparison to PFGE, more and more laboratories are currently transitioning from PFGE to WGS for bacteria typing. Nevertheless, PFGE will remain an affordable and relevant technique for small laboratories and hospitals in years to come.
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Affiliation(s)
- Hui-Min Neoh
- UKM Medical Molecular Biology Institute (UMBI), Universiti Kebangsaan Malaysia, Malaysia.
| | - Xin-Ee Tan
- Department of Infection and Immunity, School of Medicine, Jichi Medical University, Japan
| | - Hassriana Fazilla Sapri
- Department of Medical Microbiology & Immunology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Malaysia
| | - Toh Leong Tan
- Department of Emergency Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Malaysia
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21
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Zhao H, Xu S, Yang H, He C, Xu X, Hu F, Shu W, Gong F, Zhang C, Liu Q. Molecular Typing and Variations in Amount of tst Gene Expression of TSST-1-Producing Clinical Staphylococcus aureus Isolates. Front Microbiol 2019; 10:1388. [PMID: 31275293 PMCID: PMC6594356 DOI: 10.3389/fmicb.2019.01388] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 06/03/2019] [Indexed: 12/25/2022] Open
Abstract
The toxic shock syndrome toxin-1 (TSST-1), encoded by tst gene, has been proposed to cause staphylococcal toxic shock syndrome (TSS) in a susceptible host, which highlights the need to evaluate the level of tst gene expression and molecular genetic characteristics of the tst-positive isolates. A total of 916 S. aureus isolates collected from seven hospitals in China were screened for the tst gene. The tst positive isolates were characterized by spa, SCCmec, PFGE, and agr typing. Representative strains were also subjected to MLST typing. qRT-PCR was used to quantify tst and major virulence regulator genes expression. We also sequenced the regions of promoter and open reading frame (ORF) of tst to investigate whether they correlate with the variation in tst expression. We found 208 (22.7%) of surveyed isolates including 198 (29.8%) of MRSA and 10 (4.0%) of MSSA isolates harbored the tst gene. The most common clone among tst positive MRSA isolates belonged to ST5 (CC5)-agr2-t002-SCCmecII. The amount of tst mRNA varied 8.4-folds among clinical S. aureus isolates. Sequencing the tst promoter revealed a base T deletion in tst high expressed isolates. As for major virulence regulators, srrA, sarT, RNAIII, and ccpA in four tst differentially expressed strains were detected to be highly expressed, respectively. Our study revealed high prevalence of ST5 (CC5)-agr2-t002-SCCmecII clone among tst positive MRSA in hospitals from China. The levels of tst expression among clinical S. aureus isolates varied, which may be associated with tst promoter and variations in specific virulence regulators.
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Affiliation(s)
- Huanqiang Zhao
- Department of Clinical Laboratory, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Su Xu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
| | - Han Yang
- Department of Clinical Laboratory, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Chunyan He
- Department of Clinical Laboratory, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xiaogang Xu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
| | - Fupin Hu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
| | - Wen Shu
- Department of Clinical Laboratory, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Fang Gong
- Department of Clinical Laboratory, the Third Hospital Affiliated to Nantong University, Wuxi, China
| | - Chuanling Zhang
- Department of Clinical Laboratory, Xiaoshan Hospital, Hangzhou, China
| | - Qingzhong Liu
- Department of Clinical Laboratory, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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22
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Manfredi EA, Rivas M. [Food poisoning outbreak in a kindergarten in the Province of Buenos Aires, Argentina]. Rev Argent Microbiol 2019; 51:354-358. [PMID: 30885394 DOI: 10.1016/j.ram.2018.08.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 08/03/2018] [Accepted: 08/26/2018] [Indexed: 10/27/2022] Open
Abstract
On November 27, 2008, a foodborne disease outbreak associated with the consumption of chicken salad occurred in a kindergarten in the District of Hurlingham, Province of Buenos Aires. Thirty-seven children and 10 adults with gastrointestinal symptoms were affected. Five children were hospitalized with signs of dehydration, one of them requiring intensive care. Staphylococcus aureus subsp. aureus was isolated from the mentioned food in 4 out of 5 stool specimens from the patients, and in 3 out of 5 food handlers (nose of food handler #1, hands of food handlers #2 and 3). The isolates carried the genes coding for enterotoxins SEA and SED. The macrorestriction patterns showed 100% similarity by pulsed-field gel electrophoresis using the SmaI enzyme. A timely outbreak investigation allowed us to identify the causative agent of the food poisoning as well as the failures in food processing and to implement corrective measures.
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Affiliation(s)
- Eduardo A Manfredi
- Servicio de Fisiopatogenia, Departamento de Bacteriología, Instituto Nacional de Enfermedades Infecciosas-ANLIS Dr. Carlos G. Malbrán, Ciudad Autónoma de Buenos Aires, Argentina.
| | - Marta Rivas
- Servicio de Fisiopatogenia, Departamento de Bacteriología, Instituto Nacional de Enfermedades Infecciosas-ANLIS Dr. Carlos G. Malbrán, Ciudad Autónoma de Buenos Aires, Argentina
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23
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Lopez-Canovas L, Martinez Benitez MB, Herrera Isidron JA, Flores Soto E. Pulsed Field Gel Electrophoresis: Past, present, and future. Anal Biochem 2019; 573:17-29. [PMID: 30826351 DOI: 10.1016/j.ab.2019.02.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/22/2019] [Accepted: 02/22/2019] [Indexed: 12/27/2022]
Abstract
Pulsed Field Gel Electrophoresis (PFGE) has been considered for many years the 'gold-standard' for characterizing many pathogenic organisms as well as for subtyping bacterial species causing infection outbreaks. This article reviews the basic principles of PFGE and it includes the main advantages and limitations of the different electrode configurations that have been used in PFGE equipment and their influence on the DNA electrophoretic separation. Remarkably, we summarize here the most relevant theoretical and practical aspects that we have learned for more than 20 years developing and using the miniaturized PFGE systems. We also discussed the theoretical aspects related to DNA migration in PFGE agarose gels. It served as the basis for simulating the DNA electrophoretic patterns in CHEF mini gels and mini-chambers during experimental design and optimization. A critical comparison between standard and miniaturized PFGE systems, as well as the enzymatic and non-enzymatic methods for intact immobilized DNA preparation, is provided throughout the review. The PFGE current applications, advantages, limitations and future challenges of the methodology are also discussed.
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Affiliation(s)
- Lilia Lopez-Canovas
- Postgraduate Program in Genomic Sciences, School of Science and Technology (CCyT), Autonomous University of Mexico City (UACM), Mexico City, Mexico.
| | - Maximo B Martinez Benitez
- Postgraduate Program in Genomic Sciences, School of Science and Technology (CCyT), Autonomous University of Mexico City (UACM), Mexico City, Mexico.
| | | | - Eduardo Flores Soto
- Academy of Biology, School of Sciences and Humanities, UACM, Mexico City, Mexico.
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24
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Chen S, Jin Y, Lin C, Hao Z, Duan J, Guo Y, Wang S, Hu L, Wang L, Yu F. Low prevalence of mupirocin resistance among Staphylococcus aureus clinical isolates from a Chinese tertiary hospital. J Med Microbiol 2018; 68:201-205. [PMID: 30570481 DOI: 10.1099/jmm.0.000911] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Between September 2013 and March 2016, 26 (1.95 %) of 1333 Staphylococcus aureus clinical isolates from a Chinese hospital were found to be resistant to mupirocin, including 18 (1.35 %) with high-level mupirocin resistance and 8 (0.6 %) with low-level mupirocin resistance. Among the 18 isolates with high-level mupirocin resistance, 17 were associated with plasmid-mediated mupA. Meanwhile, the 8 isolates with low-level mupirocin resistance were shown to have a V588F mutation in ileS. A total of 14 sequence types (STs) and 18 spa types were identified. All four isolates with t062 belonged to ST965. Three ST5-MRSA-SCCmec II were linked to t311, which was not previously reported. Furthermore, ST764-MRSA-SCCmec II-t002, exclusively found in Japan before, was identified in this study. In conclusion, we observed relatively low prevalence of mupirocin resistance among S. aureus with considerable heterogeneity in East China. Newly emerging MRSA clones with high-level mupirocin resistance should be of concern.
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Affiliation(s)
- Shuying Chen
- 1Department of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, PR China
| | - Ye Jin
- 1Department of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, PR China
| | - Chunchan Lin
- 1Department of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, PR China
| | - Zhihao Hao
- 1Department of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, PR China
| | - Jingjing Duan
- 1Department of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, PR China
| | - Yinjuan Guo
- 1Department of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, PR China
| | - Shanshan Wang
- 1Department of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, PR China
| | - Longhua Hu
- 2Department of Laboratory Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, PR China
| | - Liangxing Wang
- 3Department of Respiratory Medicine, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, PR China
| | - Fangyou Yu
- 4Department of Clinical Laboratory, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200001, PR China
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25
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Güven Gökmen T, Kalayci Y, Yaman A, Köksal F. Molecular characterization of methicillin-resistant Staphylococcus aureus strains by spa typing and pulsed field gel electrophoresis methods. BMC Microbiol 2018; 18:155. [PMID: 30355342 PMCID: PMC6201486 DOI: 10.1186/s12866-018-1305-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Accepted: 10/04/2018] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Rapid detection of sources and transmission routes by molecular methods provides key data for risk management of methicillin-resistant Staphylococcus aureus-induced infections acquired in both the community and hospitals. This study aimed to determine the clonal relationship of methicillin-resistant S. aureus strains isolated from our hospital by pulsed-field gel electrophoresis (PFGE) and Staphylococcal protein A (spa) typing methods and to identify the predominant clones in Cukurova Region, Turkey. RESULTS All isolates analyzed by PFGE were distributed among 11 clusters. Clusters A (n = 19) and B (n = 27) were 84.1% similar and accounted for 61% of all samples. All isolates were distributed among 18 spa types, with the most common type being t030 with 31 isolates (41.3%), followed by t223 with nine isolates (12%) and t127 with seven isolates (9.3%). CONCLUSIONS We found that t030 was the most common spa type in the area where the study was conducted, as also previously shown in studies undertaken in Turkey. However, the rate of t030 in our study was below the rates reported in the literature. We also detected some rare or sporadic spa types like t127, which has not been previously defined in our country. We consider that the spa typing and PFGE methods are useful for research on clonal relations in monitoring the changing prevalent clones in specific regions.
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Affiliation(s)
- Tülin Güven Gökmen
- Ceyhan Veterinary Faculty, Department of Microbiology, Cukurova University, 01930, Adana, Turkey.,Present address: Microbiology Laboratory, Adana City Hospital, 01380, Adana, Turkey
| | - Yıldız Kalayci
- Microbiology Laboratory, Adana City Hospital, 01380, Adana, Turkey.
| | - Akgün Yaman
- Department of Microbiology, Medical Faculty, Cukurova University, 01380, Adana, Turkey
| | - Fatih Köksal
- Department of Microbiology, Medical Faculty, Cukurova University, 01380, Adana, Turkey
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26
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Dorneles EMS, Fonseca MDAM, Abreu JAP, Lage AP, Brito MAVP, Pereira CR, Brandão HM, Guimarães AS, Heinemann MB. Genetic diversity and antimicrobial resistance in Staphylococcus aureus and coagulase-negative Staphylococcus isolates from bovine mastitis in Minas Gerais, Brazil. Microbiologyopen 2018; 8:e00736. [PMID: 30298561 PMCID: PMC6528566 DOI: 10.1002/mbo3.736] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 08/10/2018] [Accepted: 08/20/2018] [Indexed: 12/02/2022] Open
Abstract
The aims of this study were to determine the antimicrobial susceptibility profile and genetic diversity of Staphylococcus spp. isolated from dairy cows in Minas Gerais, Brazil, and to assess the relationship among the isolates’ susceptibility profiles and pulsed‐field gel electrophoresis (PFGE) genotypes. Seventy‐nine isolates were used, including S. aureus (n = 71) and coagulase‐negative staphylococci (CoNS) (n = 8). Susceptibility to 12 antimicrobial agents was performed. All Staphylococcus spp. were subjected to PFGE. Staphylococcus aureus and CoNS isolates exhibited full susceptibility only to cephalothin. The greatest percentages of resistance among Staphylococcus spp. were observed to penicillins, folate pathway inhibitors, and tetracyclines. Twelve S. aureus and four CoNS were classified as multidrug resistance strains. Percentage of MRSA was also higher among CoNS (75%), compared to S. aureus isolates (2.81%). Adopting 100% of similarity, 34 different genotypes were identified. Association of minimum‐spanning tree (MST) analysis with data from municipalities, herds, methicillin‐resistant S. aureus (MRSA), and resistance patterns for all isolates did not show any clustering. However, a clustering pattern of bacterial species was observed. Results from this study indicate a high frequency of antimicrobial resistance, especially among CoNS, and a high genetic diversity among Staphylococcus spp. isolated from dairy cows with mastitis in Minas Gerais, Brazil.
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Affiliation(s)
- Elaine M S Dorneles
- Departamento de Medicina Veterinária, Universidade Federal de Lavras, Lavras, Minas Gerais, Brazil
| | - Mariana D A M Fonseca
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Juliana A P Abreu
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Andrey P Lage
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Maria A V P Brito
- Núcleo de Saúde Animal e Qualidade do Leite, Embrapa Gado de Leite, Juiz de Fora, Minas Gerais, Brazil
| | - Carine R Pereira
- Departamento de Medicina Veterinária, Universidade Federal de Lavras, Lavras, Minas Gerais, Brazil
| | - Humberto M Brandão
- Núcleo de Saúde Animal e Qualidade do Leite, Embrapa Gado de Leite, Juiz de Fora, Minas Gerais, Brazil
| | - Alessandro S Guimarães
- Departamento de Medicina Veterinária, Universidade Federal de Lavras, Lavras, Minas Gerais, Brazil.,Núcleo de Saúde Animal e Qualidade do Leite, Embrapa Gado de Leite, Juiz de Fora, Minas Gerais, Brazil
| | - Marcos B Heinemann
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brazil
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27
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McClure JAM, Lakhundi S, Kashif A, Conly JM, Zhang K. Genomic Comparison of Highly Virulent, Moderately Virulent, and Avirulent Strains From a Genetically Closely-Related MRSA ST239 Sub-lineage Provides Insights Into Pathogenesis. Front Microbiol 2018; 9:1531. [PMID: 30042755 PMCID: PMC6048232 DOI: 10.3389/fmicb.2018.01531] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 06/20/2018] [Indexed: 12/19/2022] Open
Abstract
The genomic comparison of virulent (TW20), moderately virulent (CMRSA6/CMRSA3), and avirulent (M92) strains from a genetically closely-related MRSA ST239 sub-lineage revealed striking similarities in their genomes and antibiotic resistance profiles, despite differences in virulence and pathogenicity. The main differences were in the spa gene (coding for staphylococcal protein A), lpl genes (coding for lipoprotein-like membrane proteins), cta genes (genes involved in heme synthesis), and the dfrG gene (coding for a trimethoprim-resistant dihydrofolate reductase), as well as variations in the presence or content of some prophages and plasmids, which could explain the virulence differences of these strains. TW20 was positive for all genetic traits tested, compared to CMRSA6, CMRSA3, and M92. The major components differing among these strains included spa and lpl with TW20 carrying both whereas CMRSA6/CMRSA3 carry spa identical to TW20 but have a disrupted lpl. M92 is devoid of both these traits. Considering the role played by these components in innate immunity and virulence, it is predicted that since TW20 has both the components intact and functional, these traits contribute to its pathogenesis. However, CMRSA6/CMRSA3 are missing one of these components, hence their intermediately virulent nature. On the contrary, M92 is completely devoid of both the spa and lpl genes and is avirulent. Mobile genetic elements play a potential role in virulence. TW20 carries three prophages (ϕSa6, ϕSa3, and ϕSPβ-like), a pathogenicity island and two plasmids. CMRSA6, CMRSA3, and M92 contain variations in one or more of these components. The virulence associated genes in these components include staphylokinase, entertoxins, antibiotic/antiseptic/heavy metal resistance and bacterial persistence. Additionally, there are many hypothetical proteins (present with variations among strains) with unknown function in these mobile elements which could be making an important contribution in the virulence of these strains. The above mentioned repertoire of virulence components in TW20 likely contributes to its increased virulence, while the absence and/or modification of one or more of these components in CMRSA6/CMRSA3 and M92 likely affects the virulence of the strains.
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Affiliation(s)
- Jo-Ann M. McClure
- Centre for Antimicrobial Resistance, Alberta Health Services/Calgary Laboratory Services/University of Calgary, Calgary, AB, Canada
| | - Sahreena Lakhundi
- Centre for Antimicrobial Resistance, Alberta Health Services/Calgary Laboratory Services/University of Calgary, Calgary, AB, Canada
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, AB, Canada
| | - Ayesha Kashif
- Centre for Antimicrobial Resistance, Alberta Health Services/Calgary Laboratory Services/University of Calgary, Calgary, AB, Canada
| | - John M. Conly
- Centre for Antimicrobial Resistance, Alberta Health Services/Calgary Laboratory Services/University of Calgary, Calgary, AB, Canada
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, AB, Canada
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada
- Department of Medicine, University of Calgary, Calgary, AB, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Kunyan Zhang
- Centre for Antimicrobial Resistance, Alberta Health Services/Calgary Laboratory Services/University of Calgary, Calgary, AB, Canada
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, AB, Canada
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada
- Department of Medicine, University of Calgary, Calgary, AB, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
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28
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Salazar-Ospina L, Jiménez JN. High frequency of methicillin-susceptible and methicillin-resistant Staphylococcus aureus in children under 1 year old with skin and soft tissue infections. J Pediatr (Rio J) 2018; 94:380-389. [PMID: 28941388 DOI: 10.1016/j.jped.2017.06.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 05/15/2017] [Accepted: 05/31/2017] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE Staphylococcus aureus is responsible for a large number of infections in pediatric population; however, information about the behavior of such infections in this population is limited. The aim of the study was to describe the clinical, epidemiological, and molecular characteristics of infections caused by methicillin-susceptible and resistant S. aureus (MSSA-MRSA) in a pediatric population. METHOD A cross-sectional descriptive study in patients from birth to 14 years of age from three high-complexity institutions was conducted (2008-2010). All patients infected with methicillin-resistant S. aureus and a representative sample of patients infected with methicillin-susceptible S. aureus were included. Clinical and epidemiological information was obtained from medical records and molecular characterization included spa typing, pulsed-field gel electrophoresis (PFGE), and multilocus sequence typing (MLST). In addition, staphylococcal cassette chromosome mec (SCCmec) and virulence factor genes were detected. RESULTS A total of 182 patients, 65 with methicillin-susceptible S. aureus infections and 117 with methicillin-resistant S. aureus infections, were included in the study; 41.4% of the patients being under 1 year. The most frequent infections were of the skin and soft tissues. Backgrounds such as having stayed in day care centers and previous use of antibiotics were more common in patients with methicillin-resistant S. aureus infections (p≤0.05). Sixteen clonal complexes were identified and methicillin-susceptible S. aureus strains were more diverse. The most common cassette was staphylococcal cassette chromosomemec IVc (70.8%), which was linked to Panton-Valentine leukocidin (pvl). CONCLUSIONS In contrast with other locations, a prevalence of infections in children under 1 year of age in the city could be observed; this emphasizes the importance of epidemiological knowledge at the local level.
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Affiliation(s)
- Lorena Salazar-Ospina
- Universidad de Antioquia, Escuela de Microbiología, Grupo de Investigación en Microbiología Básica y Aplicada (MICROBA), Medellín, Colombia
| | - Judy Natalia Jiménez
- Universidad de Antioquia, Escuela de Microbiología, Grupo de Investigación en Microbiología Básica y Aplicada (MICROBA), Medellín, Colombia.
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Sato T, Usui M, Maetani S, Tamura Y. Prevalence of methicillin-resistant Staphylococcus aureus among veterinary staff in small animal hospitals in Sapporo, Japan, between 2008 and 2016: A follow up study. J Infect Chemother 2018; 24:588-591. [DOI: 10.1016/j.jiac.2018.01.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 12/30/2017] [Accepted: 01/28/2018] [Indexed: 11/16/2022]
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High frequency of methicillin‐susceptible and methicillin‐resistant Staphylococcus aureus in children under 1 year old with skin and soft tissue infections. JORNAL DE PEDIATRIA (VERSÃO EM PORTUGUÊS) 2018. [DOI: 10.1016/j.jpedp.2017.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Niemann L, Müller P, Brauns J, Nathaus R, Schäkel F, Kipschull K, Höltig D, Wendt M, Schwarz S, Kadlec K. Antimicrobial susceptibility and genetic relatedness of respiratory tract pathogens in weaner pigs over a 12-month period. Vet Microbiol 2018; 219:165-170. [PMID: 29778191 DOI: 10.1016/j.vetmic.2018.03.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 03/15/2018] [Accepted: 03/28/2018] [Indexed: 10/17/2022]
Abstract
The collaboration project VASIB aims at reducing the antibiotic consumption in pig production by integrating information from consulting expertise in clinical inspection, hygiene, epidemiology, microbiology and pharmacology. In this VASIB subproject, we investigated the antimicrobial susceptibility and relatedness of porcine respiratory tract pathogens. Bordetella bronchiseptica (n = 47), Pasteurella multocida (n = 18) and Streptococcus suis (n = 58) were obtained from weaner pigs at two farms. Antimicrobial susceptibility testing was performed by broth microdilution according to CLSI standards. Resistance genes were detected via specific PCR assays. Macrorestriction analysis was conducted to determine the relatedness of the isolates and to identify clones. The B. bronchiseptica isolates showed indistinguishable (farm 1) or two closely related XbaI-patterns (farm 2). Different SmaI-PFGE patterns of P. multocida isolates were obtained at three different time points. In contrast, PFGE analysis of S. suis indicated more than one fragment pattern per pig and time point. Isolates exhibiting indistinguishable PFGE patterns were considered to represent the same clone. This study showed that only two closely related B. bronchiseptica clones were present in both farms, which had low MICs to all antimicrobials, except to β-lactams. Different P. multocida clones were present at the three time points. They showed overall low MIC values, with two clones being resistant and one intermediate to tetracycline. S. suis clones were resistant to tetracycline (n = 19) and/or erythromycin/clindamycin (n = 16). They harboured the tetracycline resistance genes tet(O), tet(M) or tet(L) and/or the macrolide/lincosamide/streptogramin B resistance gene erm(B). Five penicillin-resistant S. suis clones were also detected.
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Affiliation(s)
- Lisa Niemann
- Institute of Microbiology and Epizootics, Freie Universität Berlin, Germany; Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut (FLI), Neustadt-Mariensee, Germany
| | - Petra Müller
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Foundation, Germany
| | - Jasmin Brauns
- Clinic for Swine, Small Ruminants, Forensic Medicine and Ambulatory Services, University of Veterinary Medicine Hannover, Foundation, Germany
| | | | - Franziska Schäkel
- Institute for Biometry, Epidemiology and Information Processing, WHO Collaborating Centre for Research and Training for Health at the Human-Animal-Environment Interface, University of Veterinary Medicine Hannover, Foundation, Germany
| | | | - Doris Höltig
- Clinic for Swine, Small Ruminants, Forensic Medicine and Ambulatory Services, University of Veterinary Medicine Hannover, Foundation, Germany
| | - Michael Wendt
- Clinic for Swine, Small Ruminants, Forensic Medicine and Ambulatory Services, University of Veterinary Medicine Hannover, Foundation, Germany
| | - Stefan Schwarz
- Institute of Microbiology and Epizootics, Freie Universität Berlin, Germany.
| | - Kristina Kadlec
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut (FLI), Neustadt-Mariensee, Germany
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Characterisation ofStaphylococcus aureusstrains isolated from mastitis bovine milk in Argentina. J DAIRY RES 2018; 85:57-63. [DOI: 10.1017/s0022029917000851] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The study reported in this Research Communication was conducted to characteriseStaphylococcus aureusisolates recovered from mastitic bovine milk from dairy herds in Argentina. A total of 829 mastitic milk samples, both clinical and subclinical, were collected from 21 farms by veterinarians and submitted to the laboratory for testing from which 229S. aureusisolates were recovered, an isolation rate of 28·1%. These isolates were tested for susceptibility to the antibiotics penicillin, erythromycin and clindamycin. Of the 229 isolates, 53 (23·1%) were resistant to penicillin, 31 (13·5%) to erythromycin and 28 (12·2%) to clindamycin. All isolates were negative for themecA,mecC andpvlgenes by PCR. Southernblot hybridisation revealed that theermC gene was located on plasmid bands. Eighty isolates were randomly selected from the 229 for further characterisation. Restriction analysis of chromosomal DNA with Cf9I followed by PFGE of the 80 isolates revealed 23 distinct pulsotypes at 80% similarity. Seven major types (A, B, N, P, S, T, U and V) accounted for 68·7% of these isolates and 12 pulsotypes (A, B, F, G, J, K, M, N, P, S, T and U) occurred on more than one farm indicating genetic diversity within the farms. MLST of a representative isolate from dominant types identified the STs 97 705, 746, 2102 and 2187 with ST97 being the most predominant. Antibiotic susceptibility testing showed that 53·7% of the 80 randomly selected isolates were resistant to at least one of the three antibiotics tested. To our knowledge, this study represents the first large scale molecular studies onS. aureusisolates from dairy farms in Argentina.
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Sato T, Usui M, Konishi N, Kai A, Matsui H, Hanaki H, Tamura Y. Closely related methicillin-resistant Staphylococcus aureus isolates from retail meat, cows with mastitis, and humans in Japan. PLoS One 2017; 12:e0187319. [PMID: 29084288 PMCID: PMC5662215 DOI: 10.1371/journal.pone.0187319] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 10/13/2017] [Indexed: 11/18/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a pervasive healthcare-acquired (HA) pathogen with recent emergence as a community-acquired (CA) pathogen. To elucidate whether meat mediates MRSA transmission between animals and humans in Japan, this study examined MRSA isolates from retail meat (n = 8), cows with mastitis (n = 7), and humans (HA-MRSA = 46 and CA-MRSA = 54) by molecular typing, virulence gene analyses, and antimicrobial susceptibility testing. MRSA isolates from retail meat were classified into sequence type (ST) 8/spa type t1767 (n = 4), ST8/t4133 (n = 1), ST59/t3385 (n = 1), ST88/t375 (n = 1), and ST509/t375 (n = 1). All seven MRSA isolates from cows with mastitis were ST8/t1767. 46 HA-MRSA were clonal complex (CC) 5, divided into t002 (n = 30), t045 (n = 12), and t7455 (n = 4). 54 CA-MRSA were classified into 6 different CCs: CC1 (n = 14), CC5 (n = 7), CC8 (n = 29), CC45 (n = 1), CC89 (n = 1), CC509 (n = 1), and into 16 different spa types including newly identified t17177, t17193, and t17194. The majority were CC8/t1767 (n = 16). CC of one CA-MRSA isolate (spa type t1767) was not classified. Among 41 CC8 MRSA (five from meat, seven from cows with mastitis, and 29 CA-MRSA), 14 ST8/SCCmec IVl isolates (three from meat, one from a cow with mastitis, and 10 CA-MRSA) had identical pulsed-field gel electrophoresis patterns and similar spa type (t1767, t4133, and t17177), and were typed as CA-MRSA/J (ST8/SCCmec IVl, positive for sec + sel + tst but negative for Panton–Valentine leukocidin and the arginine catabolic mobile element). These results suggest that there is a transmission cycle of CA-MRSA/J among meat, cows, and humans in Japan, although it is unclear whether the origin is cow.
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Affiliation(s)
- Tomomi Sato
- Laboratory of Food Microbiology and Food Safety, Department of Health and Environmental Sciences, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
| | - Masaru Usui
- Laboratory of Food Microbiology and Food Safety, Department of Health and Environmental Sciences, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
| | - Noriko Konishi
- Department of Microbiology, Tokyo Metropolitan Institute of Public Health, Shinjuku-ku, Tokyo, Japan
| | - Akemi Kai
- Department of Microbiology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan
| | - Hidehito Matsui
- Infection Control Research Center, Kitasato University, Minato-ku, Tokyo, Japan
| | - Hideaki Hanaki
- Infection Control Research Center, Kitasato University, Minato-ku, Tokyo, Japan
| | - Yutaka Tamura
- Laboratory of Food Microbiology and Food Safety, Department of Health and Environmental Sciences, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
- * E-mail:
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Vanegas Múnera JM, Ocampo Ríos AM, Urrego DM, Jiménez Quiceno JN. In vitro susceptibility of methicillin-resistant Staphylococcus aureus isolates from skin and soft tissue infections to vancomycin, daptomycin, linezolid and tedizolid. Braz J Infect Dis 2017; 21:493-499. [PMID: 28432878 PMCID: PMC9425527 DOI: 10.1016/j.bjid.2017.03.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 03/21/2017] [Accepted: 03/23/2017] [Indexed: 01/12/2023] Open
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Ugarte Torres A, Chu A, Read R, MacDonald J, Gregson D, Louie T, Delongchamp J, Ward L, McClure J, Zhang K, Conly J. The epidemiology of Staphylococcus aureus carriage in patients attending inner city sexually transmitted infections and community clinics in Calgary, Canada. PLoS One 2017; 12:e0178557. [PMID: 28542601 PMCID: PMC5444836 DOI: 10.1371/journal.pone.0178557] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 05/15/2017] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Although the nares represent the most common carriage site for traditional hospital-associated strains of Staphylococcus aureus (SA), the predominant site of carriage of SA in the community is less certain. METHODS We conducted a cross-sectional study in 285 patients attending sexually transmitted diseases and inner-city clinics to evaluate the prevalence, body site colonisation and risk factors associated with carriage of methicillin susceptible SA (MSSA). All isolates were characterized by pulsed field gel electrophoresis, staphylococcal cassette chromosome mec, staphylococcal protein A and multilocus sequence typing. RESULTS The prevalence of colonisation with SA was 57.5% (164/285); 162 (56.8%) participants were colonized with MSSA, and 4 (1.4%) with methicillin-resistant SA (MRSA), 2 of them were co-colonised with both MRSA and MSSA. The most common sites of colonisation were the throat (73.1%), nares (65.2%) and interdigital web spaces of the hand (21.3%). Three out of 4 MRSA isolates were USA300-MRSA strains. Twelve MSSA isolates were closely related to the USA300 CA-MRSA. We identified sexual behaviours such as having more than 6 heterosexual sexual partners in the last 6 months and trimming pubic hair to be independently associated with MSSA colonisation, and more specifically practicing oral sex as a risk factor for throat colonisation. CONCLUSION There is a high prevalence of MSSA carriage in this population, with a low prevalence of MRSA. The throat was the most common site of carriage and sexual behaviours were found to be risk factors for MSSA colonisation. Close strain relatedness of MSSA and USA300-MRSA isolates suggests either gain or loss of the SCCmec element, respectively.
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Affiliation(s)
- Alejandra Ugarte Torres
- Division of Infectious Diseases, Department of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
| | - Angel Chu
- Division of Infectious Diseases, Department of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
- Sexually Transmitted Infections Clinic, Alberta Health Services, Calgary, Alberta, Canada
| | - Ron Read
- Division of Infectious Diseases, Department of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
- Sexually Transmitted Infections Clinic, Alberta Health Services, Calgary, Alberta, Canada
- Department of Microbiology, Infectious Diseases and Immunology, Cumming School of Medicine, Calgary, Alberta, Canada
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
| | - Judy MacDonald
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Infection Prevention & Control, Alberta Health Services, Calgary, Alberta, Canada
| | - Daniel Gregson
- Division of Infectious Diseases, Department of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine and Alberta Health Services, Calgary, Alberta, Canada
- O’Brien Institute for Public Health, Cumming School of Medicine and Alberta Health Services, University of Calgary, Calgary, Alberta, Canada
| | - Thomas Louie
- Division of Infectious Diseases, Department of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
- Department of Microbiology, Infectious Diseases and Immunology, Cumming School of Medicine, Calgary, Alberta, Canada
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
- Infection Prevention & Control, Alberta Health Services, Calgary, Alberta, Canada
| | - Johanna Delongchamp
- Centre for Antimicrobial Resistance, Alberta Health Services and University of Calgary, Alberta, Canada
| | - Linda Ward
- Infection Prevention & Control, Alberta Health Services, Calgary, Alberta, Canada
| | - Joann McClure
- Centre for Antimicrobial Resistance, Alberta Health Services and University of Calgary, Alberta, Canada
| | - Kunyan Zhang
- Division of Infectious Diseases, Department of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
- Department of Microbiology, Infectious Diseases and Immunology, Cumming School of Medicine, Calgary, Alberta, Canada
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine and Alberta Health Services, Calgary, Alberta, Canada
- Centre for Antimicrobial Resistance, Alberta Health Services and University of Calgary, Alberta, Canada
- Calgary Laboratory Services, Alberta Health Services, Calgary, Alberta, Canada
| | - John Conly
- Division of Infectious Diseases, Department of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
- Department of Microbiology, Infectious Diseases and Immunology, Cumming School of Medicine, Calgary, Alberta, Canada
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary and Alberta Health Services, Calgary, Alberta, Canada
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine and Alberta Health Services, Calgary, Alberta, Canada
- O’Brien Institute for Public Health, Cumming School of Medicine and Alberta Health Services, University of Calgary, Calgary, Alberta, Canada
- Centre for Antimicrobial Resistance, Alberta Health Services and University of Calgary, Alberta, Canada
- Calgary Laboratory Services, Alberta Health Services, Calgary, Alberta, Canada
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Can HY, Elmalı M, Karagöz A. Molecular Typing and Antimicrobial Susceptibility of Staphylococcus aureus Strains Isolated from Raw Milk, Cheese, Minced Meat, and Chicken Meat Samples. Korean J Food Sci Anim Resour 2017; 37:175-180. [PMID: 28515641 PMCID: PMC5434204 DOI: 10.5851/kosfa.2017.37.2.175] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 11/19/2016] [Accepted: 01/19/2017] [Indexed: 11/06/2022] Open
Abstract
The objectives of this study were: i) to detect the presence of Staphylococcus aureus and methicillin-resistant S. aureus (MRSA) in raw milk, cheese, beef minced meat, and chicken meat samples; ii) to evaluate the antimicrobial susceptibility of the isolates; and iii) to determine clonal relation among the isolates by using pulsed-field gel electrophoresis (PFGE) method. Therefore, a total of 160 food samples were randomly collected between August 2014 and May 2015 in Hatay province, located in the southern Turkey. Twenty (12.5%) of the samples were found to be contaminated with S. aureus. A total of 40 isolates from the 20 positive samples were confirmed to be S. aureus by multiplex PCR based on 16S rRNA and nuc gene. The mec A gene was not detected in any of the S. aureus strains. In the present study, 39 out of 40 (97.5%) isolates were found to be resistant to one or more antibiotics. All of isolates were susceptible to gentamicin, oxacillin, and vancomycin. The highest resistance rate was detected in penicillin (95%) and ampicillin (92.5%), followed by tetracycline (30%), erythromycin (20%), ciprofloxacin (12.5%). Nine major patterns were determined by PFGE. In 6 of these patterns, thirty-six strains (90%) had identical PFGE profiles.
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Affiliation(s)
- Hayriye Yeşim Can
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Mustafa Kemal University, Hatay 31000, Turkey
| | - Mehmet Elmalı
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Mustafa Kemal University, Hatay 31000, Turkey
| | - Alper Karagöz
- Microbiology Reference Laboratories Department, Public Health Institutes of Turkey, Ankara 06100, Turkey
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Singh A, Prasad KN, Rahman M, Rai RP, Singh SK, Srivastava JK. High frequency of SCC mec type V and agr type I among heterogeneous vancomycin-intermediate Staphylococcus aureus (hVISA) in north India. J Glob Antimicrob Resist 2017; 8:110-114. [DOI: 10.1016/j.jgar.2016.11.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 11/03/2016] [Accepted: 11/14/2016] [Indexed: 10/20/2022] Open
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Williams VR, Callery S, Vearncombe M, Simor AE. Acquisition of methicillin-resistant Staphylococcus aureus (MRSA) in contacts of patients newly identified as colonized or infected with MRSA in the immediate postexposure and postdischarge periods. Am J Infect Control 2017; 45:295-297. [PMID: 27765295 DOI: 10.1016/j.ajic.2016.09.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 09/09/2016] [Accepted: 09/09/2016] [Indexed: 11/16/2022]
Abstract
The acquisition of methicillin-resistant Staphylococcus aureus (MRSA) after exposure to patients colonized or infected with MRSA was assessed. Among contacts with complete surveillance screening, the rate of acquisition was 5.7% and was lower in those identified postdischarge (17/683, 2.5%) compared with those tested in the immediate postexposure period (62/706, 8.8%).
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Affiliation(s)
- Victoria R Williams
- Infection Prevention and Control, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.
| | - Sandra Callery
- Infection Prevention and Control, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Mary Vearncombe
- Infection Prevention and Control, Sunnybrook Health Sciences Centre, Toronto, ON, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - Andrew E Simor
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada; Department of Microbiology, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
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Murphy CM, Di Ruscio F, Lynskey M, Collins J, McCullough E, Cosgrave R, McDonnell D, Fennell J. Identification badge lanyards as infection control risk: a cross-sectional observation study with epidemiological analysis. J Hosp Infect 2017; 96:63-66. [PMID: 28215625 DOI: 10.1016/j.jhin.2017.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 01/14/2017] [Indexed: 11/28/2022]
Abstract
Staphylococcus aureus cultures from name badge lanyards were phenotypically and genotypically indistinguishable from the wearer's nasal carrier strains by pulsed-field gel electrophoresis and antibiogram. Lanyards had a mean age of 22 months and hygiene was poor with only 9% ever having been laundered. Molecular analysis showed that 26% of S. aureus nasal carriers shared an indistinguishable strain on their lanyard. Lanyards should not be recommended for staff in frontline clinical care.
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Affiliation(s)
- C M Murphy
- Department of Microbiology and Infection Prevention and Control, The Adelaide and Meath Hospitals, Dublin, Ireland.
| | - F Di Ruscio
- Department of Microbiology and Infection Prevention and Control, The Adelaide and Meath Hospitals, Dublin, Ireland
| | - M Lynskey
- Department of Infection Prevention and Control, The Adelaide and Meath Hospitals, Dublin incorporating the National Children's Hospital, Tallaght, Dublin, Ireland
| | - J Collins
- Department of Microbiology and Infection Prevention and Control, The Adelaide and Meath Hospitals, Dublin, Ireland
| | - E McCullough
- Department of Microbiology and Infection Prevention and Control, The Adelaide and Meath Hospitals, Dublin, Ireland
| | - R Cosgrave
- Department of Infection Prevention and Control, The Adelaide and Meath Hospitals, Dublin incorporating the National Children's Hospital, Tallaght, Dublin, Ireland
| | - D McDonnell
- Department of Infection Prevention and Control, The Adelaide and Meath Hospitals, Dublin incorporating the National Children's Hospital, Tallaght, Dublin, Ireland
| | - J Fennell
- Department of Microbiology and Infection Prevention and Control, The Adelaide and Meath Hospitals, Dublin, Ireland; Department of Clinical Microbiology, Trinity College, University of Dublin, Dublin, Ireland
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Community- and Healthcare-Associated Methicillin-Resistant Staphylococcus aureus Strains: An Investigation Into Household Transmission, Risk Factors, and Environmental Contamination. Infect Control Hosp Epidemiol 2016; 38:61-67. [PMID: 27821194 DOI: 10.1017/ice.2016.245] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To measure transmission frequencies and risk factors for household acquisition of community-associated and healthcare-associated (HA-) methicillin-resistant Staphylococcus aureus (MRSA). DESIGN Prospective cohort study from October 4, 2008, through December 3, 2012. SETTING Seven acute care hospitals in or near Toronto, Canada. PARTICIPANTS Total of 99 MRSA-colonized or MRSA-infected case patients and 183 household contacts. METHODS Baseline interviews were conducted, and surveillance cultures were collected monthly for 3 months from household members, pets, and 8 prespecified high-use environmental locations. Isolates underwent pulsed-field gel electrophoresis and staphylococcal cassette chromosome mec typing. RESULTS Overall, of 183 household contacts 89 (49%) were MRSA colonized, with 56 (31%) detected at baseline. MRSA transmission from index case to contacts negative at baseline occurred in 27 (40%) of 68 followed-up households. Strains were identical within households. The transmission risk for HA-MRSA was 39% compared with 40% (P=.95) for community-associated MRSA. HA-MRSA index cases were more likely to be older and not practice infection control measures (P=.002-.03). Household acquisition risk factors included requiring assistance and sharing bath towels (P=.001-.03). Environmental contamination was identified in 78 (79%) of 99 households and was more common in HA-MRSA households. CONCLUSION Household transmission of community-associated and HA-MRSA strains was common and the difference in transmission risk was not statistically significant. Infect Control Hosp Epidemiol 2016;1-7.
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Molecular Epidemiology of a Vancomycin-Intermediate Heteroresistant Staphylococcus epidermidis Outbreak in a Neonatal Intensive Care Unit. Antimicrob Agents Chemother 2016; 60:5673-81. [PMID: 27401579 DOI: 10.1128/aac.00726-16] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 07/06/2016] [Indexed: 01/05/2023] Open
Abstract
Coagulase-negative staphylococci (CoNS) have become the leading cause of bloodstream infections (BSIs) in intensive care units (ICUs), particularly in premature neonates. Vancomycin-intermediate heteroresistant CoNS (hVICoNS) have been identified as sources of BSIs worldwide, and their potential to emerge as significant pathogens in the neonatal ICU (NICU) remains uncertain. This study describes the molecular epidemiology of an outbreak of vancomycin-heteroresistant (hV) Staphylococcus epidermidis central-line-associated BSI (CLABSI) in a single tertiary care NICU and compares it to a second tertiary care NICU that had not been associated with an outbreak. Between November 2009 and April 2014, 119 S. epidermidis CLABSIs were identified in two tertiary care NICUs in Quebec, Canada. Decreased vancomycin susceptibility was identified in about 88% of all collected strains using Etest methods. However, discrepancies were found according to the Etest and population analysis profiling-area under the concentration-time curve (PAP-AUC) methods used. All strains were susceptible to linezolid, and a few isolates were nonsusceptible to daptomycin. Great genetic diversity was observed within the collection, with 31 pulsed-field gel electrophoresis (PFGE) patterns identified. The outbreak strains were all determined to be heteroresistant to vancomycin and were polyclonal. The study identified two major clones, PFGE patterns E and G, which were found in both NICUs across the 5-year study period. This suggests the persistence of highly successful clones that are well adapted to the hospital environment. hV S. epidermidis seems more common than currently realized in the NICU, and certain hV S. epidermidis clones can become endemic to the NICU. The reservoirs for these clones remain unknown at this time, and identification of the reservoirs is needed to better understand the impact of hV S. epidermidis in the NICU and to inform infection prevention strategies. In addition, there is a need to investigate and validate hV determination protocols for different species of CoNS.
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Zhao H, Hu F, Jin S, Xu X, Zou Y, Ding B, He C, Gong F, Liu Q. Typing of Panton-Valentine Leukocidin-Encoding Phages and lukSF-PV Gene Sequence Variation in Staphylococcus aureus from China. Front Microbiol 2016; 7:1200. [PMID: 27536288 PMCID: PMC4971802 DOI: 10.3389/fmicb.2016.01200] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 07/19/2016] [Indexed: 11/24/2022] Open
Abstract
Panton-Valentine leukocidin (PVL, encoded by lukSF-PV genes), a bi-component and pore-forming toxin, is carried by different staphylococcal bacteriophages. The prevalence of PVL in Staphylococcus aureus has been reported around the globe. However, the data on PVL-encoding phage types, lukSF-PV gene variation and chromosomal phage insertion sites for PVL-positive S. aureus are limited, especially in China. In order to obtain a more complete understanding of the molecular epidemiology of PVL-positive S. aureus, an integrated and modified PCR-based scheme was applied to detect the PVL-encoding phage types. Phage insertion locus and the lukSF-PV variant were determined by PCR and sequencing. Meanwhile, the genetic background was characterized by staphylococcal cassette chromosome mec (SCCmec) typing, staphylococcal protein A (spa) gene polymorphisms typing, pulsed-field gel electrophoresis (PFGE) typing, accessory gene regulator (agr) locus typing and multilocus sequence typing (MLST). Seventy eight (78/1175, 6.6%) isolates possessed the lukSF-PV genes and 59.0% (46/78) of PVL-positive strains belonged to CC59 lineage. Eight known different PVL-encoding phage types were detected, and Φ7247PVL/ΦST5967PVL (n = 13) and ΦPVL (n = 12) were the most prevalent among them. While 25 (25/78, 32.1%) isolates, belonging to ST30, and ST59 clones, were unable to be typed by the modified PCR-based scheme. Single nucleotide polymorphisms (SNPs) were identified at five locations in the lukSF-PV genes, two of which were non-synonymous. Maximum-likelihood tree analysis of attachment sites sequences detected six SNP profiles for attR and eight for attL, respectively. In conclusion, the PVL-positive S. aureus mainly harbored Φ7247PVL/ΦST5967PVL and ΦPVL in the regions studied. lukSF-PV gene sequences, PVL-encoding phages, and phage insertion locus generally varied with lineages. Moreover, PVL-positive clones that have emerged worldwide likely carry distinct phages.
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Affiliation(s)
- Huanqiang Zhao
- Department of Clinical Laboratory, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University Shanghai, China
| | - Fupin Hu
- Institute of Antibiotics, Huashan Hospital, Fudan University Shanghai, China
| | - Shu Jin
- Experimental Research Center, Shanghai People's Hospital of Putuo District Shanghai, China
| | - Xiaogang Xu
- Institute of Antibiotics, Huashan Hospital, Fudan University Shanghai, China
| | - Yuhan Zou
- Experimental Research Center, Shanghai People's Hospital of Putuo District Shanghai, China
| | - Baixing Ding
- Institute of Antibiotics, Huashan Hospital, Fudan University Shanghai, China
| | - Chunyan He
- Department of Clinical Laboratory, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University Shanghai, China
| | - Fang Gong
- Department of Clinical Laboratory, The Third Hospital Affiliated to Nantong University Wuxi, China
| | - Qingzhong Liu
- Department of Clinical Laboratory, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University Shanghai, China
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van der Heijden IM, de Oliveira LM, Brito GC, Abdala E, Freire MP, Rossi F, D'Albuquerque LAC, Levin ASS, Costa SF. Virulence and resistance profiles of MRSA isolates in pre- and post-liver transplantation patients using microarray. J Med Microbiol 2016; 65:1060-1073. [PMID: 27473165 DOI: 10.1099/jmm.0.000324] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) screening plays a great role in preventing infections in surgical patients. This study aims to evaluate clonality, virulence and resistance of MRSA in pre- and post-liver transplantation (LT) patients. Nasal and groin swabs of 190 patients were collected. PCR for virulence genes and staphylococcal cassette chromosome mec (SCCmec) types, microarray, PFGE, multilocus sequence typing and MIC were performed. MRSA carriers were detected in 20.5 % (39/190) of the patients. However, only three colonized patients developed infections post-LT. Sixty-nine MRSA isolates were identified, and the most frequent SCCmec type was type II (29/69; 42.0 %). Most isolates (57/69; 82.6 %) were susceptible to trimethoprim-sulfamethoxazole (TMP/SMX) and harboured the lukD, lukE, clf and fnbA genes as determined by PCR. Five sequence types (ST) were identified among nine clones; 36.2 % (25/69) isolates belonged to a predominant clone (ST105 and SCCmec type II) that was susceptible to TMP/SMX, mupirocin and chlorhexidine, which had 87.9 % similarity with the New York/Japan clone. The array showed virulence difference in isolates of the same clone and patients and that colonized isolates (pre-LT patients) were less virulent than those post-LT and those infected. Therefore, despite the high frequency of MRSA colonization, infection due to MRSA was uncommon in our LT unit. MRSA isolates presented great diversity. Isolates of the same clone expressed different virulence factors by array. Colonizing isolates pre-LT expressed less virulent factors than post-LT and infecting isolates.
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Affiliation(s)
- Inneke Marie van der Heijden
- Department of Infectious Diseases, Laboratory of Medical Investigation (LIM 54), Hospital das Clínicas - FMUSP, Sao Paulo, Brazil.,Department of Infectious Diseases, FMUSP, University of Sao Paulo, Brazil.,Department of Pathology, Discipline of Microbiology and Immunology, ABC Medicine School, FMABC, Santo André, Brazil
| | - Larissa Marques de Oliveira
- Department of Infectious Diseases, FMUSP, University of Sao Paulo, Brazil.,Department of Infectious Diseases, Laboratory of Medical Investigation (LIM 54), Hospital das Clínicas - FMUSP, Sao Paulo, Brazil
| | - Glauber Costa Brito
- ICESP - Institute of Cancer of Sao Paulo, FFM, University of Sao Paulo, Brazil
| | - Edson Abdala
- Department of Infectious Diseases, FMUSP, University of Sao Paulo, Brazil
| | | | - Flavia Rossi
- Department of Pathology, Division of Microbiology of the Central Laboratory (LIM 03), Hospital das Clínicas - FMUSP, University of Sao Paulo, Brazil
| | - Luiz Augusto Carneiro D'Albuquerque
- Liver and Gastrointestinal Transplant Division, Department of Gastroenterology, Hospital das Clínicas - FMUSP, University of Sao Paulo, Brazil
| | - Anna Sara Shafferman Levin
- Department of Infectious Diseases, FMUSP, University of Sao Paulo, Brazil.,Department of Infectious Diseases, Laboratory of Medical Investigation (LIM 54), Hospital das Clínicas - FMUSP, Sao Paulo, Brazil.,Department of Infection Control, Hospital das Clínicas - FMUSP, University of Sao Paulo, Brazil
| | - Silvia Figueiredo Costa
- Department of Infectious Diseases, FMUSP, University of Sao Paulo, Brazil.,Department of Infectious Diseases, Laboratory of Medical Investigation (LIM 54), Hospital das Clínicas - FMUSP, Sao Paulo, Brazil.,Department of Infection Control, Hospital das Clínicas - FMUSP, University of Sao Paulo, Brazil
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Comparing the epidemiology of hospital-acquired methicillin-resistant Staphylococcus aureus clone groups in Alberta, Canada. Epidemiol Infect 2016; 144:2184-90. [PMID: 26947456 DOI: 10.1017/s0950268816000376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Patients with methicillin-resistant Staphylococcus aureus (MRSA) clones, which were traditionally seen in the community setting (USA400/CMRSA7 and USA300/CMRSA10), are often identified as hospital-acquired (HA) infections using Infection Prevention and Control (IPC) surveillance definitions. This study examined the demographics and healthcare risk factors of patients with HA-MRSA to help understand if community MRSA clones are from a source internal or external to the hospital setting. Despite USA300/CMRSA10 being the predominant clone in Alberta, hospital clones (USA100/CMRSA2) still dominated in the acute care setting. In the Alberta hospitalized population, patients with USA400/CMRSA7 and USA300/CMRSA10 clones were significantly younger, had fewer comorbidities, and a greater proportion had none or ambulatory care-only healthcare exposure. These findings suggest that there are two distinct populations of HA-MRSA patients, and the patients with USA400/CMRSA7 and USA300/CMRSA10 clones identified in hospital more greatly resemble patients affected by those clones in the community. It is possible that epidemiological assessment overidentifies HA acquisition of MRSA in patients unscreened for MRSA on admission to acute care.
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Vautor E, Jay C, Chevalier N, Visomblin N, Vernet G, Pépin M. Characterization of 26 Isolates of Staphylococcus Aureus, Predominantly from Dairy Sheep, Using Four Different Techniques of Molecular Epidemiology. J Vet Diagn Invest 2016; 17:363-8. [PMID: 16130996 DOI: 10.1177/104063870501700411] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Little information is available regarding the molecular epidemiology of Staphylococcus aureus–induced mastitis in dairy sheep. In this study, 4 different typing techniques were compared in typing 26 S. aureus isolates, predominantly from cases of subclinical mastitis in dairy ewes. The 4 techniques were pulsed-field gel electrophoresis (PFGE), restriction fragment length polymorphism (RFLP) on 2 genes (coagulase and clumping factor B), randomly amplified polymorphic DNA–polymerase chain reaction (PCR) (RAPD-PCR), and multilocus sequence typing (MLST). On the basis of discriminatory power as the key parameter of typing systems, MLST and PFGE were found to be the most powerful techniques. The MLST and PFGE could contribute to epidemiological surveillance and evaluation of mastitis control programs, by documenting prevalence and dissemination of endemic clones in infected populations. The results of this study show that a single clone of S. aureus is widely distributed in infected ewe mammary glands.
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Affiliation(s)
- Eric Vautor
- Agence Française de Sécurité Sanitaire des Aliments (AFSSA), Laboratoire d'Etudes et de Recherches sur les Petits Ruminants et les Abeilles, BP 111, F-06902 Sophia Antipolis, France
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Zarakolu P, Metan G, Ünal S, Karahan ZC, Tekeli A. Bacterial factors influencing the mortality for methicillin-resistant Staphylococcus aureus (MRSA) bacteremia. Infect Dis (Lond) 2016; 48:649-50. [PMID: 27167630 DOI: 10.1080/23744235.2016.1180710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
- Pınar Zarakolu
- a Faculty of Medicine, Department of Infectious Diseases and Clinical Microbiology , Hacettepe University , Ankara , Turkey
| | - Gökhan Metan
- a Faculty of Medicine, Department of Infectious Diseases and Clinical Microbiology , Hacettepe University , Ankara , Turkey
| | - Serhat Ünal
- a Faculty of Medicine, Department of Infectious Diseases and Clinical Microbiology , Hacettepe University , Ankara , Turkey
| | - Zeynep Ceren Karahan
- b Faculty of Medicine, Department of Medical Microbiology , Ankara University , Ankara , Turkey
| | - Alper Tekeli
- b Faculty of Medicine, Department of Medical Microbiology , Ankara University , Ankara , Turkey
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Kuroda T, Kinoshita Y, Niwa H, Shinzaki Y, Tamura N, Hobo S, Kuwano A. Meticillin-resistant Staphylococcus aureus colonisation and infection in Thoroughbred racehorses and veterinarians in Japan. Vet Rec 2016; 178:473. [PMID: 27114407 DOI: 10.1136/vr.103576] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/01/2015] [Indexed: 11/04/2022]
Abstract
Meticillin-resistant Staphylococcus aureus (MRSA) infections have been confirmed in hospitalised Thoroughbred racehorses at the hospitals of two training centres in Japan since 2009. To investigate the source of infection, the authors examined the rate of nasal MRSA colonisation in 600 healthy Thoroughbred racehorses, 53 veterinarians and 16 office staff at the racehorse hospitals of the two training centres. MRSA was not isolated from healthy Thoroughbred racehorses or hospital office staff. However, MRSA was isolated from 16 veterinarians (30.1 per cent), and the colonisation rate was significantly higher in veterinarians than in the office staff of the same hospitals. Also, 10 of the 16 MRSA strains (62.5 per cent) isolated from veterinarians were classified as type II by staphylococcal cassette chromosome mec (SCCmec) typing and ST5 by multilocus sequence typing. Pulsed-field gel electrophoresis analysis demonstrated that these 10 MRSA strains of SCCmec type II and ST5 were genetically identical or very similar to 9 MRSA strains isolated from infected horses hospitalised at these hospitals between 2009 and 2013. These results indicate that SCCmec type II and ST5 MRSA strains were probably transmitted between veterinarians and infected horses.
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Affiliation(s)
- T Kuroda
- Clinical Science & Pathobiology Division, Equine Research Institute, Japan Racing Association, Tokami-Cho 321-4, Utsunomiya, Tochigi 320-0856, Japan
| | - Y Kinoshita
- Microbiology Division, Epizootic Research Center, Equine Research Institute, Japan Racing Association, Shiba 1400-4, Shimotsuke, Tochigi 329-0412, Japan
| | - H Niwa
- Microbiology Division, Epizootic Research Center, Equine Research Institute, Japan Racing Association, Shiba 1400-4, Shimotsuke, Tochigi 329-0412, Japan
| | - Y Shinzaki
- Racehorse Clinic, Ritto Training Center, Japan Racing Association, Misono 1028, Ritto, Shiga 520-3085, Japan
| | - N Tamura
- Clinical Science & Pathobiology Division, Equine Research Institute, Japan Racing Association, Tokami-Cho 321-4, Utsunomiya, Tochigi 320-0856, Japan
| | - S Hobo
- Department of Domestic Animal Internal Medicine, Clinical Veterinary Science, Veterinary Medicine, Joint Faculty of Veterinary Medicine, Kagoshima University, Korimoto 1-21-24, Kagoshima, Kagoshima 890-0065, Japan
| | - A Kuwano
- Clinical Science & Pathobiology Division, Equine Research Institute, Japan Racing Association, Tokami-Cho 321-4, Utsunomiya, Tochigi 320-0856, Japan
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Bourguignon E, Viçosa G, Corsini C, Moreira M, Nero L, Conceição L. Description of Methicillin-resistant Staphylococcus pseudintermedius from canine pyoderma in Minas Gerais state, Brazil. ARQ BRAS MED VET ZOO 2016. [DOI: 10.1590/1678-4162-8150] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Methicillin-resistant Staphylococcus pseudintermedius (MRSP) is of worldwide concern in veterinary medicine. The identification of resistant strains is necessary for proper treatment and the prevention of its propagation among animals. This study aimed to identify S. pseudintermedius isolated from canine pyoderma and evaluate their resistance profiles. Lesions from 25 dogs with pyoderma were sampled. Bacterial isolates were subjected to phenotypic and genotypic analysis for identification of the causative agent. S. pseudintermedius isolates were subjected to SmaI macrorestriction analysis and PFGE for genetic grouping, and PCR to identify the presence of the mecA gene. Their resistance profiles against 12 antimicrobials were also assessed. According to the microbiological analysis, 70 of the 75 isolates obtained were S. pseudintermedius. The isolates presented PFGE patterns, with similarity varying between 84.6 and 100%, and were grouped into 19 clusters. Despite a high frequency of mecA-positive isolates (66 out 70), only 12 presented resistances to oxacillin. Multi-resistance was identified in 29 isolates. The high frequency of MRSP isolated in this study highlights the relevance of identifying resistant strains to lead proper clinical treatment.
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Affiliation(s)
| | | | | | | | - L.A. Nero
- Universidade Federal de Viçosa, Brasil
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Tekeli A, Ocal DN, Ozmen BB, Karahan ZC, Dolapci I. Molecular Characterization of Methicillin-Resistant Staphylococcus aureus Bloodstream Isolates in a Turkish University Hospital Between 2002 and 2012. Microb Drug Resist 2016; 22:564-569. [PMID: 26982281 DOI: 10.1089/mdr.2015.0116] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
AIMS Methicillin-resistant Staphylococcus aureus (MRSA) is one of the most important pathogens in the hospital environment. Monitoring of this pathogen by molecular characterization and phenotypic methods is important for the development of suitable infection control measures and proper therapy design. In this study, our aim was to investigate the molecular epidemiological characteristics of MRSA bloodstream isolates obtained from patients hospitalized at Ankara University Ibn-i Sina Hospital in a 10-year period (2002-2012) and monitor the possible changes. A total of 134 isolates were characterized according to their antimicrobial susceptibility profiles, biofilm formation capabilities, accessory gene regulator (agr) locus types, presence of genes encoding Panton-Valentine leukocidin (PVL), staphylococcal enterotoxins A-J (SEs A-J), toxic shock syndrome toxin, sasX, and genes associated with biofilm formation (icaD, icaA, IS256) by polymerase chain reaction. The staphylococcal cassette chromosome mec (SCCmec) types of isolates were also defined and their clonal relationships were investigated by pulsed-field gel electrophoresis (PFGE) analysis and multilocus sequence typing was performed for representative isolates obtained by PFGE. RESULTS The majority of the isolates were resistant to rifampin (100%), ciprofloxacin (97%), tetracycline (97.7%), and gentamicin (94.7%); 100% carried type-III SCCmec and 89.5% were agr type-1. All the isolates were negative for PVL, and sasX genes while all of them carried the icaD, icaA, and IS256 genes. The most common SE was enterotoxin A (97%). Four major PFGE patterns with the dominance of one pattern and seven unique patterns were obtained. All the representative PFGE isolates (n = 11) belonged to sequence type 239. CONCLUSION We have documented the characteristics of the dominant MRSA clone in our hospital, which was a PVL (-), sasX (-) ST239 clone carrying sea (+) with type-III SCCmec, and type-1 agr locus.
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Affiliation(s)
- Alper Tekeli
- 1 Department of Medical Microbiology, Ankara University School of Medicine , Ankara, Turkey
| | - Duygu Nilufer Ocal
- 2 Department of Microbiology, Ankara Diskapi Yildirim Beyazit Training and Research Hospital , Ankara, Turkey
| | - Busra Betul Ozmen
- 1 Department of Medical Microbiology, Ankara University School of Medicine , Ankara, Turkey
| | - Zeynep Ceren Karahan
- 1 Department of Medical Microbiology, Ankara University School of Medicine , Ankara, Turkey .,3 Central Bacteriology Laboratory, İbn-i Sina Hospital , Ankara, Turkey
| | - Istar Dolapci
- 1 Department of Medical Microbiology, Ankara University School of Medicine , Ankara, Turkey
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Diseminación de cepas Staphylococcus aureus sensible a meticilina (SASM) relacionadas genéticamente, pertenecientes al CC45, entre portadores nasales sanos de hogares infantiles de Medellín, Colombia. Enferm Infecc Microbiol Clin 2016; 34:159-65. [DOI: 10.1016/j.eimc.2015.04.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/27/2015] [Accepted: 04/15/2015] [Indexed: 02/07/2023]
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