Technical Report on critical concentrations for drug susceptibility testing of isoniazid and the rifamycins (rifampicin, rifabutin and rifapentine)

Please see below the new updated technical report by WHO on critical concentrations for INH and RIF DST.
The rifampicin CCs for 7H10 and MGIT were lowered from 1 to 0.5 mg/L and guidance is provided about how to resolve discordant results for the borderline resistance mutations in rpoB .