First isolation of a newly described Mycobacterium insubricum from freshwater fish

Non-tuberculous or potentially pathogenic mycobacteria are ubiquitous in a water environment and are responsible for several diseases in animals and humans known as mycobacterioses. This report describes the first isolation of the novel species Mycobacterium insubricum in clinically healthy freshwater fish (Tinca tinca) in the Czech Republic which is the first to be derived from non-human sources reported in the literature.