title: Lack of syncytium formation by a type C virus-producing XC cell line in the mixed culture cytopathogenicity test.
mesh_terms: D000818:Animals; D002460:Cell Line; D002478:Cells, Cultured; D003588:Cytopathogenic Effect, Viral; D008979:Moloney murine leukemia virus; D051381:Rats; D012190:Retroviridae / Q000302:isolation & purification*; D001357:Sarcoma, Avian / Q000382:microbiology*