<unk>  is a species of the phylum actinobacteria (Gram-positive bacteria with high guanine and cytosine content, one of the dominant phyla of all bacteria), belonging to the genus mycobacterium.
These non-tuberculous mycobacteria are sometimes found in fouling water-based cutting fluids, often causing hypersensitivity pneumonitis to the machinists in the affected grinding plants.
Mycobacterium immunogenum
Mycobacterium xenopi
Mycobacterium abscessus
Mycobacterium terrae
Mycobacterium szulgai
Mycobacterium celatum
Mycobacterium marinum
Mycobacterium chelonae