[Isolation of the influenza virus from ducks in the Aral Sea region].

Influenza A/duck/Aralsk/1/78 virus was isolated from ducks in southwestern Kazakhstan. Typing of this virus neuraminidase indicated its appurtenance to the 2nd avian type. Hemagglutinin of A/duck/Aralsk/1/78 virus typed by the HI test showed no relationship with any one of the strains used in the test including H0, H1, H2, H3, Hsw1, Heq1, Heq2, viruses and strains with all 10 avian hemagglutinins.

[Isolation of influenza virus from Chlidonias nigra and serologic examination of the birds for antibodies to influenza virus].

Influenza A virus with the antigenic formulae Hav4Neq2 has been isolated from Chlidonias nigra in the region of mass moulting in the territory of the Kazakh SSR. Antihemagglutinins for the newly isolated virus were detected in the sera of some specimens of the sea gull order. The data obtained suggest an active circulation of the virus in this region during the summer of 1977.

[Immune structure of the population of Moscow to the strains of the influenza viruses A(H3N2), A(H1N1) and B circulating in 1977].

Examinations for the presence of antihemagglutinins to influenza A(H3N2), A(H1N1) and B virus strains in the sera from people of different ages collected in April-May and October-November, 1977, showed that influenza A(H1N1) virus began to circulate in the human population of Moscow before the onset of an overt epidemic, in the period between June and October, 1977. This conclusion has been drawn on the basis of the absence of antihemagglutinins to A(H1N1) virus in the sera from subjects of 16-20 years late in April and their detection in 25.9% of those examined on November 23, 1977.

[Study of 2 strains of viruses isolated from black-tailed gulls in the Primorsk region in autumn 1972].

Two virus strains identified as paramyxoviruses have been first isolated in the Premorskiy region from Larus crassirostris feeding on food wastes from a fur farm.