Tuberculosis (TB)

TB drug resistance types

TB drug resistance types

Mono-resistance: resistance to one first-line anti-TB drug only

Poly-resistance: resistance to more than one first-line anti-TB drug, other than both isoniazid and rifampicin

Multidrug resistance (MDR): resistance to at least both isoniazid and rifampicin

Extensive drug resistance (XDR): resistance to any fluoroquinolone, and at least one of three second-line injectable drugs (capreomycin, kanamycin and amikacin), in addition to multidrug resistance

Rifampicin resistance (RR): resistance to rifampicin detected using phenotypic or genotypic methods, with or without resistance to other anti-TB drugs. It includes any resistance to rifampicin, in the form of mono-resistance, poly-resistance, MDR or XDR.

Related links