title: Visna virus: a "slow" neurotropic agent with tumor virus properties.
mesh_terms: D000818:Animals; D004254:DNA Nucleotidyltransferases; D004279:DNA, Viral / Q000032:analysis; D009858:Oncogenic Viruses; D011328:Prions / Q000032:analysis / Q000201:enzymology; D012367:RNA, Viral / Q000032:analysis; D012756:Sheep; D012897:Slow Virus Diseases / Q000662:veterinary*; D014779:Virus Replication
chemical_list: D004279:DNA, Viral; D011328:Prions; D012367:RNA, Viral; D004254:DNA Nucleotidyltransferases