Virus pneumonia of pigs: filtration and visualization of a causative agent.
D000818:Animals; D001431:Bacteriological Techniques; D008853:Microscopy; D008854:Microscopy, Electron; D009174:Mycoplasma / Q000302:isolation & purification*; D011024:Pneumonia, Viral / Q000382:microbiology / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000382:microbiology*