Source:http://linkedlifedata.com/resource/umls/id/C0317752
NCI: Any bacterial organism that can be assigned to the species Mycobacterium simiae.,NCI: 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.