Table 1. MDR suspect criteria as defined by the Revised National Tuberculosis Control Programme, India.

Criteria A

• All failures of new TB cases

• Smear positive previously treated cases who remain smear positive from the 4th month onwards

• All pulmonary TB cases who are contacts of known MDR TB cases

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 coinfected cases at diagnosis