Mycobacterium marinum
ALSO KNOWN AS: Fish Handler’s Disease
Mycobacterium marinum is a bacterial pathogen that causes mycobacteriosis in fish and a condition known as “fish handler’s disease” in humans. It belongs to the Mycobacterium genus, which includes several pathogens affecting vertebrates. Infected fish may develop granulomas, skin ulcers, and systemic infections. The bacterium is zoonotic, meaning it can be transmitted to humans through direct contact with contaminated water or infected fish, leading to localized skin infections.
Distribution: Common worldwide in freshwater and marine environments.
Hosts: A wide range of fish species and occasionally humans.
Detection Methods: Microscopic examination – histology.
Target Tissue: Skin, internal organs, and systemic infection.
