Mycobacterium marinum strain ATCC 927

Mycobacterium marinum strain ATCC 927 is a Gram-positive, aerobic bacillus known to inhabit various aquatic environments, including freshwater, marine habitats, and domestic aquariums. This organism is classified as a chemoorganotroph, utilizing organic compounds for energy. It typically exists as single cells and possesses flagella, which contribute to its mobility. The optimal growth temperature for M. marinum is around 30°C, placing it within the mesophilic temperature range, which is conducive to its survival in warm aquatic environments. This strain has a single replicon and is recognized for its free-living biotic relationship. M. marinum is known to infect a range of hosts, including humans (Homo sapiens), various fish species such as Oreochromis niloticus and Danio rerio, as well as other metazoans. In humans, it can lead to opportunistic infections, including skin lesions and cutaneous infections, commonly associated with conditions like fish tank granuloma and chronic systemic infections. Additionally, it has been linked to more severe health effects such as peritonitis and necrotizing granuloma resembling tuberculosis. In ecological terms, the presence of M. marinum in aquatic systems highlights the potential risks associated with interacting with contaminated environments, particularly for those engaged in aquarium keeping or those who may come into contact with infected aquatic organisms. Its role as a pathogen in both human and aquatic animal populations underscores the importance of maintaining clean and healthy aquatic ecosystems.