title: [Case of isolation of the influenza virus B from the nasopharynx of a healthy human being].
abstract: To isolate influenza virus, 52 healthy persons were subjected to virological examination at a period between epidemics, and 40 healthy persons during an epidemic. Among the group of 40 persons influenza virus could be isolated from one subject after the second passage in chick embryos. The virus was identified as the causative agent of influenza B. In the blood serum of this subject an increase in the titer of antibodies to the above-mentioned virus to 1: 40 was registered. The possibility of either short-term asymptomatic infection, or more or less prolonged virus carriership in this healthy subject may be supposed.
mesh_terms: D000328:Adult; D000818:Animals; D000914:Antibodies, Viral / Q000032:analysis; D002642:Chick Embryo; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D009305:Nasopharynx / Q000382:microbiology*; D009975:Orthomyxoviridae / Q000276:immunology / Q000302:isolation & purification*
chemical_list: D000914:Antibodies, Viral
vernacular_title: Sluchaĭ vydeleniia virusa grippa B iz nosoglotki zdorovogo cheloveka.