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Blacktongue

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Black Tongue
(1) A hyperpigmented tongue seen in dogs with niacin deficiency, equivalent to pellagra
(2) The natural colour of the tongue of the chow-chow and shar-pei breeds of dogs. Regarded as a form of benign pigmentation, any dog can have a black tongue

blacktongue
a prominent feature of the severe stomatitis that occurs in dogs from niacin nutritional deficiency. Recognition that this condition was responsive to niacin led to identification of the cause of the human disease pellagra.


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