Maedi and visna in sheep.
D000818:Animals; D002490:Central Nervous System / Q000473:pathology; D003711:Demyelinating Diseases / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D004679:Encephalomyelitis / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary*; D007055:Iceland; D008168:Lung / Q000473:pathology; D011021:Pneumonia, Progressive Interstitial, of Sheep / Q000453:epidemiology / Q000382:microbiology / Q000473:pathology; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology / Q000382:microbiology / Q000473:pathology; D012897:Slow Virus Diseases / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D014790:Visna-maedi virus / Q000302:isolation & purification