Mycobacterium fortuitum subsp. fortuitum Cruz 1, GB 178, Gdf M93, Lausanne 1021, X42, 140410001

Mycobacterium fortuitum subsp. fortuitum, represented by strains Cruz 1, GB 178, Gdf M93, Lausanne 1021, X42, and 140410001, is a chemoheterotrophic, facultative anaerobic bacterium. This organism is rod-shaped and lacks mobility, indicative of its non-motile nature. It is notable for its presence in chloraminated and chlorinated water sources, which suggests its resilience in treated water environments. The optimal growth temperature for this subspecies is 30°C, and it thrives within a mesophilic temperature range. M. fortuitum subsp. fortuitum has a single replicon, emphasizing its genetic simplicity compared to more complex organisms. It is known to infect Homo sapiens, leading to pulmonary mycobacteriosis and other lung diseases. The health effects associated with this bacterium highlight its potential pathogenicity in immunocompromised individuals or those with pre-existing lung conditions. The presence of M. fortuitum subsp. fortuitum in chlorinated water systems underscores the importance of monitoring water quality, as it can pose a health risk to humans. Its ability to survive in treated water environments may be an ecological adaptation that allows it to persist despite disinfection efforts. Understanding the habitats and characteristics of this subspecies can aid in developing strategies to mitigate its impact on human health.