What causes fish TB?
Bacteria of the species Mycobacterium marinum. These bacteria also infect fish and can cause loss of fish. These bacteria can occur in fresh and marine waters in temperate or tropical areas of the world, and on areas wetted by those waters. The bacteria are slow-reproducing and resistant to treatment. There are probably several to many different strains (affecting fish, affecting frogs, etc., affecting humans, and in different environments) of Mycobacterium marinum throughout the world. Other species of Mycobacterium cause leprosy, human TB, and various other Mycobacterium-caused problems.
