<prompt> A patient with HIV has diarrhoea with AFBve organism in stool. The most likely organism is:Mycobacterium avium intracellulareMycobacterium TBMycobacterium lepraeMycoplasma  <response>: Ans. is a i.e., Mycobacterium avium intraceliulareRef: Ananthanarayan, 9the, p. 576; Harrison, 18the, p. 1548; 17the, 1173 MAC infection is a late complication of HIV infection, occurs when CD450ml, in contrast to T.B. which occurs early even with CD4300ml Clinical Features:- Disseminated disease with fever, weight loss and night sweats most common.- Abdominal pain.- Diarrhoea.- Lymphadenopathy. Diagnosis is made by demonstration of AFB positive mycobacteria in sputum, stool, blood or bone narrow. 