Investigation of the incidence of influenza A viraemia caused by virus strains circulating among children in 1968 - 1977.

Nineteen strains of Type A influenza virus isolated from the blood of small children in 1968--77 were studied. The investigation of the strains in HAIR with antisera to the antigenic components of the strains in HAIR with antisera to the antigenic components of the strains A/Hong-Kong/68,A/Anglia/72, A/Port Chalmers/73 and A/Victoria/75 made it possible to demonstrate antigenic "drive" of the haemagglutinin in the years 1968--1977 and to divide the strains into 4 varieties. A high sensitivity to inhibitors was observed in all the strains isolated.

[Detection of an agent similar to rotavirus in infantile gastroenteritis].

The etiology of nonbacterial enterovirus infections in children was studied in autumn and winter under conditions of focal outbreaks in Moscow hospitals. Electron microscopy revealed a reovirus-like agent in concentrated suspensions of feces collected in the acute period of the disease from children suffering from diarrhea. Examinations of paired sera from the patients by the CF test with the antigen of Nebraska calf disease virus established significant rises in antibody titers in 68.

Use of duck embryo cell cultures for the study of arbovirus reproduction.

Duck embryo cell (DEC) cultures were used for the study of arbovirus reproduction. High sensitivity of DEC cultures to Japanese encephalitis, West Nile, Tyuleniy, Sakhalin and Baku viruses was established. DEC cultures are recommended for investigation of arbovirus reproduction.