<prompt> Under the RNTCP, for diagnosis of MDR TB, currently drug sensitivity testing is done for:RifampicinRifampicin, IsoniazideRifampicin, Isoniazide and EthambutolRifampicin, Isoniazide and Pyrazinamide  <response>: 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: 