title: Study of a small amoeba from mammalian cell cultures infected with 'Ryan virus'.
mesh_terms: D000656:Amoeba / Q000145:classification / Q000254:growth & development / Q000302:isolation & purification*; D003588:Cytopathogenic Effect, Viral; D056890:Eukaryota / Q000254:growth & development / Q000302:isolation & purification*; D006367:HeLa Cells / Q000382:microbiology*; D006801:Humans; D008938:Mitosis; D014776:Virus Cultivation; D014713:Viruses, Unclassified