system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
After initiation of DOTS therapy for category-I, first sputum examination is done at: March 2010
assistant
The correct answer is  Ans. B: 2 months of treatment The treatment in Category I consists of an intensive phase of H, R, Z and E administered under a direct supervision thrice weekly on alternate days for 2 months, followed by a continuation phase of H and R thrice weekly on alternate days for 4 months In the Category 1 follow-up, sputum examination is done at 2, 4 and 6 months of treatment. If smear is positive after 2 months, the intensive phase is extended for one more month and sputum examinations done at 3, 5 and 7 months.