[Isolation of strains of Negishi virus in Khabarovsk Territory]. / Vydelenie shtammov virusa Negishi v Khabarovskom krae.

Two virus strains isolated from Aedes vexans nipponi and Aedes vexans vexans in 1976 and 1978, respectively, in Khabarovsk Territory were identified as Negishi virus. Among 176 human sera, 22.7% were found to contain complement-fixing antibodies to Negishi virus soluble antigen.

[Incidence of influenza virus infection in black-headed gulls]. / Infitsirovannost' ozernykh chaek virusami grippa.

Two strains of influenza A viruses were isolated in 1978 from tracheal washings of 18 nestlings of black-headed gulls examined for influenza. Three strains of influenza A viruses were isolated in 1979 from 55 gull embryos collected in the same colony, the isolates being similar in their antigenic characteristics with the influenza virus isolated from a gull nestling in 1978. This confirms the possibility of simultaneous circulation of antigenically different variants of influenza A virus among birds in the same colony and transoviral transmission of virus to the offsprings.