| bluetongue | A reovirus infection, chiefly of sheep, characterised by a swollen blue tongue, catarrhal inflammation of upper respiratory and gastrointestinal tracts, and often by inflammation of sensitive laminae of the feet and coronet. (12 Dec 1998) |
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| bluetongue virus | The type species of orbivirus causing a serious disease in sheep, especially lambs. It may also infect wild ruminants and other domestic animals. (12 Dec 1998) |