title: Attenuation of virulence of a bunyavirus involving an L RNA defect and isolation of LAC/SSH/LAC and LAC/SSH/SSH reassortants.
mesh_terms: D000818:Animals; D002043:Bunyaviridae / Q000472:pathogenicity*; D002141:Encephalitis Virus, California / Q000235:genetics / Q000254:growth & development / Q000472:pathogenicity*; D005814:Genes, Viral; D005838:Genotype; D051379:Mice; D009154:Mutation; D012367:RNA, Viral / Q000235:genetics*; D011995:Recombination, Genetic; D010948:Viral Plaque Assay
chemical_list: D012367:RNA, Viral