title: Herpes-type virus recovery from "virus-free" frog kidney tumors.
mesh_terms: D000230:Adenocarcinoma; D000818:Animals; D000867:Anterior Chamber; D001001:Anura; D001345:Autoradiography; D002499:Centrifugation, Density Gradient; D006564:Herpesviridae / Q000302:isolation & purification*; D006566:Herpesviridae Infections / Q000150:complications / Q000473:pathology*; D007680:Kidney Neoplasms / Q000382:microbiology* / Q000473:pathology; D008854:Microscopy, Electron; D009368:Neoplasm Transplantation; D009374:Neoplasms, Experimental; D012621:Seasons