The pathology of visna and maedi in sheep.
D000818:Animals; D001921:Brain / Q000473:pathology; D002490:Central Nervous System / Q000473:pathology; D003711:Demyelinating Diseases / Q000473:pathology / Q000662:veterinary; D004679:Encephalomyelitis / Q000473:pathology / Q000662:veterinary*; D008168:Lung / Q000473:pathology; D008578:Meninges / Q000473:pathology; D009928:Organ Specificity; D011021:Pneumonia, Progressive Interstitial, of Sheep / Q000473:pathology*; D012756:Sheep; D012757:Sheep Diseases / Q000473:pathology*; D012897:Slow Virus Diseases / Q000473:pathology; D013116:Spinal Cord / Q000473:pathology