A long term follow up study of symptom recurrence and action taking of TB patients of urban clinics in metropolitan cities may be of limited value. But such follow up studies based on a PHC, which is an important rural diagnostic and treatment unit in the TB programmes will be of a great value, because the center is responsible for comprehensive preventive and curative services to the community through family and household units. It is, therefore, important to know whether a TB patient, diagnosed and put on treatment by the centre, experiences recurrence of the symptom, for which he has sought relief at the centre and if so whether he goes in search of relief elsewhere.