Resistance to more than one antituberculosis drug, other than both isoniazid and rifampicin

Resistance to any two or more anti-tuberculosis drugs

Case with resistance to two or more drugs, but not to rifampicin

Tuberculosis in patients who′s infecting isolates are resistant in vitro to more than one first-line anti-tuberculosis drug other than both isoniazid and rifampicin

Strain of M. tuberculosis is resistant to more than one first-line anti-TB medicinea other than both isoniazid and rifampicin