Comparative analysis of multidrug-resistant, non-multidrug-resistant, and archaic methicillin-resistant Staphylococcus aureus isolates from central Sydney, Australia

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dc.contributor.authorWatson, J.
dc.contributor.authorGivney, R.
dc.contributor.authorBeard-Pegler, M.
dc.contributor.authorRose, B.
dc.contributor.authorMerlino, J.
dc.contributor.authorVickery, A.
dc.contributor.authorGottlieb, T.
dc.contributor.authorBradbury, R.
dc.contributor.authorHarbour, C.
dc.date.issued2003
dc.descriptionCopyright © 2003, American Society for Microbiology. All Rights Reserved.
dc.description.abstractIn this study, the phenotypic and genotypic characteristics of 50 methicillin-resistant Staphylococcus aureus (MRSA) isolates (43 contemporary and 7 archaic strains from the mid-1960s) from four Sydney hospitals in the central Sydney area were compared. Phenotypic analysis based on antibiotic profiles and phage typing patterns categorized the MRSA isolates into three major groups: multidrug resistant (mMRSA), non-multidrug resistant (nmMRSA), and archaic. The nmMRSA isolates could be further subdivided into nmMRSA group 1, which was phage typeable and similar to the archaic group; nmMRSA group 2, which was non-phage typeable and only resistant to ciprofloxacin; and nmMRSA group 3, which was also nontypeable and generally resistant to other antibiotics. The characterization of all five phenotypic groups was then extended by genetic analysis. Restriction fragment length polymorphism (RFLP) analysis showed the 50 isolates could be sorted into 20 group-specific pulsotypes. mecI gene deletions and mutations at various percentages among the five MRSA groups were detected by sequencing. Several mec promoter mutations were also found. The overall findings indicated that nmMRSA strains may have independently acquired mec DNA and are more likely to be newly emergent strains than nmMRSA variants.
dc.description.statementofresponsibilityJason Watson, Rod Givney, Mary Beard-Pegler, Barbara Rose, John Merlino, Alison Vickery, Tom Gottlieb, Ross Bradbury, and Colin Harbour
dc.identifier.citationJournal of Clinical Microbiology, 2003; 41(2):867-872
dc.identifier.doi10.1128/JCM.41.2.867-872.2003
dc.identifier.issn0095-1137
dc.identifier.issn1098-660X
dc.identifier.urihttp://hdl.handle.net/2440/55920
dc.language.isoen
dc.publisherAmer Soc Microbiology
dc.source.urihttps://doi.org/10.1128/jcm.41.2.867-872.2003
dc.subjectHumans
dc.subjectStaphylococcus aureus
dc.subjectAnti-Bacterial Agents
dc.subjectMicrobial Sensitivity Tests
dc.subjectMethicillin Resistance
dc.subjectDrug Resistance, Multiple
dc.subjectGenotype
dc.subjectPhenotype
dc.subjectAustralia
dc.titleComparative analysis of multidrug-resistant, non-multidrug-resistant, and archaic methicillin-resistant Staphylococcus aureus isolates from central Sydney, Australia
dc.typeJournal article
pubs.publication-statusPublished

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