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- Rapidly-growing non-tubercular mycobacterium (NTM).
- Typically takes 3-7 days for clinical cultures to become positive, but may require longer incubation.
- Reservoirs: soil, water, animals, marine life. Worldwide distribution.
- M. fortuitum group includes M. peregrinum, M. houstonese, M. boenickei, M. mageritense, M. senegalense and Mycobacterium setense sp. nov. Differentiation only by molecular testing.