Zusammenfassung
This study compared the BD GeneOhm(TM) MRSA real-time PCR assay to BBL(TM) CHROMagar(TM) MRSA for the detection of methicillin-resistant Staphylococcus aureus in 627 nasal surveillance specimens collected from ICU-patients. The PCR assay had sensitivity, specificity, positive predictive value and negative predictive values of 100\%, 96.7\%, 70.3\%, and 100\%, respectively. Nine of nineteen false-positive PCR specimens grew methicillin-susceptible S. aureus (MSSA) from broth enrichment culture of which two demonstrated evidence of mecA gene dropout. Compared to BBL(TM) CHROMagar(TM) MRSA, the BD GeneOhm(TM) MRSA PCR assay demonstrated sensitivity and specificity above 95\% for the detection of MRSA nasal colonization compared to chromogenic agar and provided shorter turn around time in generating positive and negative final results.
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