A total of 217 specimens submitted for routine smear and culture from three different sites within the western United States were used to evaluate the GeneXpert MTB/RIF assay (for research use only) (Cepheid, Sunnyvale, CA). Overall agreement compared to culture was 89% (98% for smear positives and 72% for smear negatives) for detection of Mycobacterium tuberculosis.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3122817PMC
http://dx.doi.org/10.1128/JCM.02214-10DOI Listing

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