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. 2011 Aug;49(8):2996-9.
doi: 10.1128/JCM.00046-11. Epub 2011 Jun 15.

Prevalence and genetic relatedness of methicillin-susceptible Staphylococcus aureus isolates detected by the Xpert MRSA nasal assay

Sophie S Arbefeville  1 , Kunyan Zhang, Jennifer S Kroeger, Wanita J Howard, Daniel J Diekema, Sandra S Richter
Affiliations

Prevalence and genetic relatedness of methicillin-susceptible Staphylococcus aureus isolates detected by the Xpert MRSA nasal assay

Sophie S Arbefeville et al. J Clin Microbiol. 2011 Aug.

Abstract

Methicillin-susceptible Staphylococcus aureus (MSSA) isolates lacking mecA yet testing positive on the Xpert MRSA assay were recovered from culture for 7.7% of 248 Xpert-positive nasal samples. These "false-positive" Xpert results may be attributed to staphylococcal cassette chromosome (SCC) elements without the mecA gene. Pulsed-field gel electrophoresis (PFGE) analysis revealed a diverse population of MSSA strains.

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Figures

Fig. 1.
Fig. 1.
PFGE profiles of 20 MSSA isolates detected by the Xpert MRSA assay.
See this image and copyright information in PMC

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