What Is Mycobacterium Avium Complex?

Mycobacterium avium complex (MAC) is a group of closely related bacterial species that cause a variety of infections in humans and animals. The most common species in the MAC are *Mycobacterium avium* and *Mycobacterium intracellulare*.

MAC infections are usually acquired from environmental sources, such as water or soil. The bacteria can enter the body through the respiratory tract, the gastrointestinal tract, or through breaks in the skin.

MAC infections can cause a variety of symptoms, depending on the site of the infection. Common symptoms include fever, chills, weight loss, fatigue, and night sweats. MAC infections can also cause pneumonia, diarrhea, skin infections, and bone and joint infections.

MAC infections are often difficult to diagnose, as they can mimic other diseases, such as tuberculosis. A variety of tests can be used to diagnose MAC infections, including blood tests, sputum cultures, and tissue biopsies.

MAC infections are typically treated with antibiotics, such as clarithromycin, azithromycin, or rifampin. Treatment is often long-term and can last for several months.

MAC infections can be serious, especially in people with weakened immune systems. However, early diagnosis and treatment can help to prevent serious complications.