This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Leprosy, HIV & STDs, Subject name: Social & Preventive Medicine
[{'content': 'In the management of leprosy, Lepromin test is most useful for:- \nSelect and explain. \nA. Herd immunity, B. Prognosis, C. Treatment, D. Epidemiological investigations', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In the management of leprosy, Lepromin test is most useful for prognosis. LEPROMIN TEST: - The test is performed by injecting intradermally 0.1 ml of lepromin at inner aspect of the forearm of the individual. - Two types of positive reaction have been described: Early reaction - also known as FERNANDEZ reaction, read after 3 days Late reaction - also known as MITSUDA reaction, read after 3 weeks - Lepromin test is not a diagnostic test. The test has been generally accepted as a useful tool in evaluating the immune status (CMI) of leprosy patients. - The test is also of great value in estimating the prognosis in case of leprosy of all types.', 'role': 'assistant'}]