Figure 2From: The manual mycobacteria growth indicator tube and the nitrate reductase assay for the rapid detection of rifampicin resistance of M. Tuberculosisin low resource settings An example of a test result of an isolate tested using NRA. C-Rifampicin free control, D-Rifampicin containing medium, S1- Rifampicin susceptible strain of M. tuberculosis, S2- Rifampicin resistant strain of M. tuberculosis. Back to article page