NCIt definition : A species of aerobic, Gram positive, rod shaped bacterium assigned to the phylum Actinobacteria.
This species is acid fast, does not grow on MacConkey agar, catalase, urease and niacin
positive, and negative for nitrite reduction and Tween 80 hydrolysis. M. simiae is
found primarily in the southwestern United States, Israel and Cuba, with tap water
as its suspected reservoir. It causes infection mainly in immunocompromised patients
and is often resistant to most conventional anti-tuberculosis medications including
rifabutin.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Mycobacterium simiae.;