Tuberculosis (TB) is prevalent in India and continues to be a leading cause of death1. Its control programmes can achieve a high level of treatment success2 and are associated with a decline in reported disease burden3. This is possible only if there is an effective TB control programme like the Directly Observed Treatment - Short Course (DOTS) aimed for higher cure and case detection. When the programme is successful, more cases will be detected and treated successfully. This will result in cutting the transmission in the community. Prevalence of the disease is estimated by undertaking epidemiological survey in the community and it involves researchers, trained field workers, X-ray units, X-ray films, sputum bottles, laboratory.
