Medical Dictionary
ovine progressive pneumonia
noun
Medical Definition of OVINE PROGRESSIVE PNEUMONIA
: a chronic disease especially of sheep caused by a retrovirus of the genus Lentivirus (species Visna/maedi virus) and occurring in a respiratory form that affects the lungs and udder and produces progressive wasting and in an encephalitic form that affects the central nervous system and joints and leads eventually to paralysis—see maedi, visna
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