Mycolicibacterium fortuitum subsp. fortuitum DSM 46621 = ATCC 6841

Mycolicibacterium fortuitum subsp. fortuitum DSM 46621 (ATCC 6841) is a non-sporulating, rod-shaped bacterium that thrives in soil environments. As a facultative anaerobe, it can utilize both aerobic and anaerobic conditions for growth, and it is classified as a chemoheterotroph, deriving energy from organic compounds. This microorganism is mesophilic, with an optimal growth temperature of 30°C, indicating its preference for moderate temperature ranges. M. fortuitum is noted for its lack of mobility; it does not possess flagella, which suggests a reliance on external factors for dispersal in its natural habitat. The organism has a single replicon, indicating a relatively simple genomic structure compared to more complex organisms. It has a diverse range of hosts, including humans (Homo sapiens), various mammals (e.g., Bos, Sus scrofa, Canis lupus familiaris, and Felis catus), amphibians, birds (Aves), and reptiles (e.g., Python regius and Iguana iguana). Clinically, M. fortuitum is associated with a variety of health effects, notably skin and soft tissue infections, pulmonary infections, and diseases such as endocarditis and lymphadenitis. These infections are often linked to its presence in the environment and can pose risks to both immunocompetent and immunocompromised individuals. The ecological role of Mycolicibacterium fortuitum in soil may be significant, as its interactions with various hosts highlight its potential as an opportunistic pathogen, particularly in environments where it may be transmitted to animals and humans. Understanding its habitat and pathogenic traits can inform public health strategies and environmental assessments.