Figure 1: Diagnostic algorithm for use of conventional microscopy, culture (solid or liquid), molecular assays and drug susceptibility testing methods. AFB – Acid fast bacilli, LPA – Line probe assay, PCR – Polymerase chain reaction, NRA – Nitrate reductase assay, MODS – Microscopic observation drug susceptibility assay, MDR – Multidrug‑resistant, XDR – Extensively drug‑resistant