title: Pathogenesis of visna: review and speculation.
mesh_terms: D000453:Aleutian Mink Disease / Q000473:pathology; D000818:Animals; D000917:Antibody Formation; D001769:Blood / Q000382:microbiology; D002490:Central Nervous System / Q000382:microbiology; D002555:Cerebrospinal Fluid / Q000382:microbiology; D003711:Demyelinating Diseases / Q000473:pathology; D004679:Encephalomyelitis / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D008221:Lymphoid Tissue / Q000382:microbiology; D011021:Pneumonia, Progressive Interstitial, of Sheep / Q000473:pathology; D012328:RNA Viruses / Q000302:isolation & purification; D012756:Sheep; D012757:Sheep Diseases / Q000382:microbiology / Q000473:pathology*; D012897:Slow Virus Diseases / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D014790:Visna-maedi virus / Q000254:growth & development / Q000276:immunology / Q000302:isolation & purification