Performance of the cobas MRSA/SA Test for Simultaneous Detection of Methicillin-Susceptible and Methicillin-Resistant Staphylococcus aureus From Nasal Swabs.

Journal Article (Clinical Trial;Journal Article;Multicenter Study)

Objectives: Health care-associated methicillin-resistant Staphylococcus aureus (MRSA) and Staphylococcus aureus (SA) infections are continuing problems. Rapidly determining the MRSA colonization status of a patient facilitates practice to reduce spread of MRSA clinical disease. Sensitive detection of all SA prior to surgery, followed by decolonization, can significantly reduce postoperative infection from this pathogen. Our goal was to validate a new automated assay for this testing. Methods: We compared performance of the cobas MRSA/SA Test on the cobas 4800 System to direct and enriched chromogenic culture using nasal swabs collected from patients at six United States sites. Results: Compared to direct and enriched culture, the sensitivity for MRSA and SA was 93.1% and 93.9%, and the specificity was 97.5% and 94.2%, respectively. After discrepancy analysis, the sensitivity for MRSA and SA was 97.1% and 98.6%, and the specificity was 98.3% and 95.5%, respectively. Compared to direct culture, sensitivity for detecting any SA was 99.6%. Conclusions: The cobas MRSA/SA Test is an effective tool to simultaneously perform surveillance testing for nasal colonization of both MRSA and MSSA.

Full Text

Duke Authors

Cited Authors

  • Peterson, LR; Woods, CW; Davis, TE; Wang, Z-X; Young, SA; Osiecki, JC; Lewinski, MA; Liesenfeld, O

Published Date

  • August 1, 2017

Published In

Volume / Issue

  • 148 / 2

Start / End Page

  • 119 - 127

PubMed ID

  • 28898981

Electronic International Standard Serial Number (EISSN)

  • 1943-7722

Digital Object Identifier (DOI)

  • 10.1093/ajcp/aqx040


  • eng

Conference Location

  • England