Criteria A: ・ All failures of new TB cases ・ Smear positive previously treated cases who remain smear positive at 4th month onwards ・ All pulmonary TB cases who are contacts of known MDR TB case |
Criteria B: in addition to Criteria A: ・ All smear positive previously treated pulmonary TB cases at diagnosis ・ Any smear positive follow up result in new or previously treated cases |
Criteria C: in addition to Criteria B ・ All smear negative previously treated pulmonary TB cases at diagnosis, ・ HIV TB co-infected cases at diagnosis |