Visna definitions

visna

fatal brain disease of sheep
Found on http://phrontistery.info/v.html

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visna

Demyelinating leukoencephalomyelitis of sheep caused by the visna-maedi virus. It is similiar to but not the same as scrapie. ... (12 Dec 1998) ...
Found on http://www.encyclo.co.uk/local/20973

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