title: Tissue culture studies of the virus of progressive pneumonia, a slow infectious disease of sheep.
mesh_terms: D000818:Animals; D046508:Culture Techniques; D003588:Cytopathogenic Effect, Viral; D005455:Fluorescent Antibody Technique; D006387:Hemagglutination, Viral; D008168:Lung; D011024:Pneumonia, Viral / Q000662:veterinary*; D012328:RNA Viruses; D012756:Sheep; D012757:Sheep Diseases / Q000209:etiology*; D014776:Virus Cultivation; D014779:Virus Replication