Nontuberculous, or atypical, mycobacteria are ubiquitous in the environment, being found in soil, lakes, streams, various food sources, and in domestic animals.

• 讨论：非结核性或称为不典型的分枝杆菌普遍存在于周围环境之中，如泥土、湖泊、溪流、各种食物及家畜。