title: Role of macrophages in the immunopathogenesis of visna-maedi of sheep.
mesh_terms: D000818:Animals; D003588:Cytopathogenic Effect, Viral; D008264:Macrophages / Q000276:immunology*; D011021:Pneumonia, Progressive Interstitial, of Sheep / Q000209:etiology / Q000276:immunology*; D012756:Sheep; D014771:Virion / Q000276:immunology; D014779:Virus Replication; D014790:Visna-maedi virus / Q000502:physiology*