Under the RNTCP, for diagnosis of MDR TB, currently drug sensitivity testing is done for:
Presently conventional solid egg-based Lowenstein-Jensen (LJ) media will be used for primary culture at the RNTCP accredited laboratory. DST will be performed for streptomycin (S), isoniazid (H), rifampicin (R) and ethambutol (E) only. Pyrazinamide (Z) sensitivity testing may be included at a later period of DOTS-Plus implementation. Ref:
Rifampicin
Rifampicin, Isoniazide
Rifampicin, Isoniazide and Ethambutol
Rifampicin, Isoniazide and Pyrazinamide