title: Morphological variation in ephemeral fever virus strains.
mesh_terms: D000818:Animals; D002417:Cattle; D002460:Cell Line; D006224:Cricetinae; D004810:Ephemeral Fever / Q000382:microbiology*; D007668:Kidney; D008854:Microscopy, Electron; D009500:Neutralization Tests; D014776:Virus Cultivation; D014713:Viruses, Unclassified / Q000276:immunology