In-House Phage Amplification Assay Is a Sound Alternative for Detecting Rifampin-Resistant Mycobacterium tuberculosis in Low-Resource Settings

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Abstract
An in-house mycobacteriophage amplification assay for detecting rifampin-resistant Mycobacterium tuberculosis showed 100% sensitivity, 97.7% specificity, and 95.2% predictive value for resistance in a test of 129 isolates from a hot spot area of multidrug-resistant M. tuberculosis. The applicability of the test was demonstrated in the routine work flow of a low-resource reference laboratory.