a disease caused by Mycobacterium avium or Mycobacterium intracellular (sometimes referred to as Mycobacterium avium-intracellular or MAI), bacteria found in soil and water. In immunosuppressed persons, the bacteria can infect the lymph nodes, intestines, bone marrow, liver, spleen, spinal fluid, lungs and the gastrointestinal tract. MAC is the most common bacterial infection in persons with advanced AIDS (usually under 50-75 CD4 cells/mm3). Symptoms include diarrhea, wasting, fever, night sweats, fatigue and spleen enlargement. Clarithromycin is used as treatment and prophylaxis for MAC.

A common opportunistic infection caused from certain bacteria found in dust and soil.

A serious opportunistic infection that causes symptoms including night sweats, high fever, cough, weight loss, general fatigue, malabsorption of food, and diarrhea.