title: Etiology of murine endemic pneumonia.
mesh_terms: D000818:Animals; D051379:Mice; D009174:Mycoplasma; D011024:Pneumonia, Viral / Q000209:etiology*; D051381:Rats; D012376:Rodent Diseases / Q000209:etiology*; D014713:Viruses, Unclassified / Q000302:isolation & purification*