Postmortem isolation of Mycobacterium marinum from yellow-bellied slider (Trachemys scripta scripta).

Abstract

Mycobacterium marinum, a slow-growing non-tuberculous mycobacterium, is known for causing skin infections in fish and amphibians, commonly known as “fish tank granuloma” or “swimming pool granuloma”. While its primary impact is on aquatic species, humans also face a potential risk through exposure to contaminated water or aquatic environments. In humans, infections typically are manifested as nodular skin lesions, often on the hands or fingers, leading to a chronic and indolent course. Due to its unique ability to thrive in aquatic environments, M. marinum serves as an infectious agent not only for fish but also for other animal species, including reptiles, especially turtles. The turtle case of postmortem isolation of M. marinum described in this work serves as a reminder of the threat posed by this bacterium, highlighting the relatively low awareness surrounding this subject not only among owners but also among veterinarians. Expanding our understanding of the threats posed by M. marinum is crucial, not only for the well-being of aquatic animals, including turtles, but also for human health. Given the zoonotic potential of M. marinum, a comprehensive understanding of its transmission dynamics, clinical manifestations, and preventive measures is essential. Hence this knowledge can inform strategies to minimize the risk of M. marinum infections overall.