Bovine tuberculosis in an Asian small-clawed otter (Aonyx cinerea) in the Republic of Korea

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Abstract
Bovine tuberculosis caused by Mycobacterium bovis has a wide range of hosts including cattle and humans, but its incidence in otters is very rare. Our report describes a case of bovine tuberculosis in an Asian small-clawed otter (Aonyx cinerea). A deceased female otter ~2–3 years of age that was raised in an aquarium was submitted to the Animal and Plant Quarantine Agency (Anyang, Republic of Korea) for autopsy in June 2013. Following gross pathological examination, many white nodules were observed in the lungs and mesentery. The nodules showed central necrosis infiltrated with lymphocytes and macrophages and surrounded by fibrous tissue. Acid-fast bacteria were detected in the necrotic foci, but no fungi were observed. Molecular analysis led to the detection of M. bovis, which is identified in otters in some European countries such as Spain and France.

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