RESUMEN
The results of screening more than 23,000 serum samples from persons belonging to risk groups, as well as those not belonging to such groups, in Moscow, Vilnius and Klaipeda are presented. Screening was carried out with the use of an assay system manufactured by the Scientific and Industrial Amalgamation "Antigen" (USSR). In this screening 3 HIV carriers were detected; of these, 2 were foreign students from two African countries.
Asunto(s)
Síndrome de Inmunodeficiencia Adquirida/prevención & control , Portador Sano/prevención & control , Anticuerpos Anti-VIH/sangre , VIH-1/inmunología , Tamizaje Masivo/métodos , Síndrome de Inmunodeficiencia Adquirida/epidemiología , Síndrome de Inmunodeficiencia Adquirida/inmunología , Donantes de Sangre , Portador Sano/epidemiología , Portador Sano/inmunología , Ensayo de Inmunoadsorción Enzimática , Seropositividad para VIH/epidemiología , Seropositividad para VIH/inmunología , Humanos , Immunoblotting , Lituania/epidemiología , Moscú/epidemiología , Factores de RiesgoRESUMEN
Antibodies to hepatitis A virus were determined in the sera of healthy population by enzyme immunoassay techniques. The distribution of antibodies in different age groups was compared, taking into account the proportion of persons with high, moderate and low titers. Among the surveyed regions, the highest proportion of nonimmune persons was detected in Moscow (45 %) and the lowest proportion, in Aralsk (7%) and Mongolia (3%). In some regions (Moscow, Vilnius) the characteristic feature of the immune structure of the population was the gradual increase of the occurrence of antibodies and their levels with age, while in other regions (Aralsk, Mongolia) the intensive acquisition of antibodies occurred at younger ages with a subsequent decline in antibody levels. Some of the possible mechanisms of the formation of population immunity to hepatitis A are discussed.