species found in zoos. Cases have been reported in almost all orders of birds (Karlson, 1978). Mycobacterial infections and tuberculosis also occur in reptiles (snakes, lizards, turtles, and tortoises) (Brownstein, 1978) and in fish (Wolke and Stroud, 1978), usually as sporadic disease episodes with low morbidity. Mycobacteria isolated from fish include M. marinum and M. fortuitum (Wolke and Stroud, 1978). Organisms isolated from reptiles have all been within the Runyon groups I and IV. Mycobacterium marinum is the species most commonly isolated in reptiles; infections are less frequently caused by M. chelonei and M. thamnopheos. Most of these organisms produce disease only when the host is immunosuppressed or when large numbers of organisms are introduced.

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