Mycobacterium avium complex
Overview
 
Mycobacterium avium complex (MAC) is a group of genetically related bacteria
Bacteria
Bacteria are a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals...

 belonging to the genus Mycobacterium
Mycobacterium
Mycobacterium is a genus of Actinobacteria, given its own family, the Mycobacteriaceae. The genus includes pathogens known to cause serious diseases in mammals, including tuberculosis and leprosy...

. It includes Mycobacterium avium and Mycobacterium intracellulare
Mycobacterium intracellulare
Mycobacterium intracellulare is a species of Mycobacterium.-Description:"Gram-positive", nonmotile and acid-fast short to long rods.Colony characteristics*Usually smooth, rarely rough and nonpigmented colonies...

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