<unk>  may cause chronic human pulmonary disease resembling tuberculosis. Extrapulmonary infections, such as cervical lymphadenitis in children, cutaneous and soft tissues infections, and musculoskeletal system involvement are uncommon. Rarely it causes disseminated disease in patients with severely impaired cellular immunity (such as organ transplants or AIDS). Pre-existing lung disease such as silicosis is a risk factor.<unk>  occasionally involves the skin in a sporotrichoid pattern. It is unclear where people acquire the infection and person-to-person spread is not thought to occur. Tap water is believed to be the major reservoir associated with human disease. Biosafety level 2 is indicated.
Mycobacterium kansasii
Mycobacterium africanum
Mycobacterium tuberculosis
Mycobacterium canetti
Mycobacterium haemophilum
Mycobacterium orygis
Mycoplasma incognitus
Bacillus anthracis