title: Antigenic structure and biological characteristics of influenza strains isolated in the USSR during the 1974/75 epidemic.
abstract: Antigenic analysis of strains isolated in the USSR during the epidemic in 1974/1975 showed differences in the hemagglutination inhibition test and in neuramidase activity with antisera against three reference strains. Strains isolated in a later period of the epidemic were classified into subgroup A/Port Chalmers/1/73. Nearly all strains were effective inducers of interferon and were susceptible to this inhibitor of virus replication.
mesh_terms: D000954:Antigens, Surface / Q000032:analysis; D000956:Antigens, Viral / Q000032:analysis*; D004196:Disease Outbreaks / Q000453:epidemiology*; D000939:Epitopes; D006387:Hemagglutination, Viral; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D009975:Orthomyxoviridae / Q000145:classification / Q000276:immunology / Q000302:isolation & purification*; D012703:Serotyping; D014586:USSR
chemical_list: D000954:Antigens, Surface; D000956:Antigens, Viral; D000939:Epitopes