title: [The role of subclinical forms of epidemic parotitis in the formation of collective immunity].
abstract: A study was made of the outbreaks of epidemic parotitis in kindergartens and schools. Of 276 children aged from 2 to 13 years 58 (21%) sustained clinically manifest infection and 48 (17.4%)--a subclinical one. The clinically manifest process mostly developed in children aged from 3 to 5 years: the ratio of the clinical and subclinical forms in them constituted 1:0.5. With the progress of age there was an increase in the proportion of the subclinical forms (in 10--13-year-old children this ratio was 1:1.3). The presence of blood antihemagglutinins in the titre of up to 1:64 before the infection failed to prevent the development of the infectious process. There was no correlation between the antibody titre and the severity of the infectious process. Subclinical cases of parotitis were accompanied by less intensive antibody production than the clinically manifest ones.
mesh_terms: D000293:Adolescent; D000914:Antibodies, Viral / Q000096:biosynthesis*; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D006801:Humans; D009031:Moscow; D009107:Mumps / Q000453:epidemiology / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral
vernacular_title: Rol' subklinicheskikh form épidemicheskogo parotita v formirovanii kollektivnogo immuniteta