We evaluated the performance of the Cobas TaqMan MTB test (Roche Diagnostics, Basel, Switzerland), stratified by acid-fast bacilli (AFB) smear grades. The sensitivity of this test in smear-positive specimens was >95% in all grades, while that in trace and negative specimens was 85.3% and 34.4%, respectively.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4298533PMC
http://dx.doi.org/10.1128/JCM.02630-14DOI Listing

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