title: The isolation of organisms resembling rickettsiae from respiratory tracts of horses.
mesh_terms: D000818:Animals; D001315:Australia; D002642:Chick Embryo; D046508:Culture Techniques; D006168:Guinea Pigs; D006734:Horse Diseases / Q000382:microbiology*; D006736:Horses / Q000382:microbiology*; D008297:Male; D051379:Mice; D008854:Microscopy, Electron; D009297:Nasal Mucosa / Q000382:microbiology; D012141:Respiratory Tract Infections / Q000382:microbiology / Q000662:veterinary*; D012281:Rickettsia / Q000302:isolation & purification*