The questionnaire will be pre-tested to ensure its reliability and validity. Inmate peer educators will be thoroughly trained in TB screening procedures and treatment supervision. The supervisors assigned to each prison alone, or with the principal investigator, will supervise the activities, do a rapid assessment of the general activities, and give a timely solution to the problems met. Experienced laboratory professionals will be involved in the microscopic examination and quality control of the slides examined will be ensured at regional laboratories in each region.