People with pulmonary MAC infections may experience cough, weight loss, fever, fatigue, and night sweats. The symptoms of pulmonary MAC infection start slowly, get worse over time and may last for weeks to months. For example, pulmonary MAC mainly affects the lungs disseminated MAC affects the whole body and MAC lymphadenitis causes swollen lymph nodes. Mycobacterium avium complex infections can cause various symptoms depending on the site of the infection. Treatment for MAC infection depends on the type and may include antibiotics, antiviral medications, or surgery. MAC infections are diagnosed by a combination of imaging scans and identifying the bacteria in cultures of cells from the infected area. MAC bacteria are not usually spread from person to person. They infect people when the bacteria are inhaled or swallowed. MAC bacteria are found in water, soil, and dust. While the symptoms are different for each type of infection, general symptoms include fever, night sweats, weight loss, and fatigue. MAC-associated lymphadenitis - Causes swelling of the lymph nodes (especially in the neck) and is the most common in young children who have normal immune systems.This type is usually seen in people with advanced AIDS. Disseminated MAC infections - Have spread throughout the body.These mainly affect elderly women and people who already have lung disease. Pulmonary MAC infections - Affect the lungs and are the most common type.Elderly women are also at higher risk to get sick from MAC infections. However, people with immune systems that do not work well (from HIV/AIDS or certain cancers for example) or people with lung disease (such as chronic obstructive pulmonary disease (COPD) or cystic fibrosis) are at the greatest risk for getting sick from MAC Infections. MAC bacteria do not make most people sick.

Listen Mycobacterium avium complex (MAC) refers to infections caused by two types of bacteria: Mycobacterium avium and Mycobacterium intracellulare.

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