JAC Advance Access originally published online on March 20, 2008
Journal of Antimicrobial Chemotherapy 2008 61(6):1277-1280; doi:10.1093/jac/dkn122
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Original research |
Microbiological evaluation of a new growth-based approach for rapid detection of methicillin-resistant Staphylococcus aureus
1 Institute of Medical Microbiology, University Hospital of Münster, Domagkstr. 10, 48149 Münster, Germany 2 Institute for Hygiene, University Hospital of Münster, Robert-Koch-Str. 41, 48149 Münster, Germany
Received 18 January 2008; returned 12 February 2008; revised 26 February 2008; accepted 26 February 2008
* Corresponding author. Tel: +49-251-83-55360; Fax: +49-251-83-55350; E-mail: eiffc{at}uni-muenster.de
Objectives: Recently, a rapid screening tool for methicillin-resistant Staphylococcus aureus (MRSA) has been introduced that applies a novel detection technology allowing the rapid presence or absence of MRSA to be determined from an enrichment broth after only a few hours of incubation. To evaluate the reliability of this new assay to successfully detect MRSA strains of different origin and clonality, well-characterized S. aureus strains were tested in this study.
Methods: More than 700 methicillin-susceptible and methicillin-resistant strains covering >90% of all registered European MRSA spa types within the SeqNet network were studied.
Results: All 513 MRSA strains tested were recognized as methicillin-resistant: among these, 96 MRSA strains were from an institutional collection, each presenting a unique spa type. None of the 211 methicillin-susceptible strains were detected as positive.
Conclusions: The new growth-based rapid MRSA assay was shown to detect without exception all MRSA strains of large collections of strains comprising highly diverse genetic backgrounds, indicating that such a phenotypic test might be potentially more likely to cope with new strains.
Keywords: staphylococci , MRSA , infection control , spa typing
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