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
Which of the following mycobacteria can cause disease in HIV+ve patient with a CD4 count of 600/ cu.mm?
assistant
The correct answer is  Ans. is 'a' i.e., M. Tuberculosis . MAC infection occurs when CD4 + T cells counts are < 50/ml, in contrast M. tuberculosis infection develops early in the course with CD4 T cells counts > 300/ml.