title: Distribution of the serotypes of group A streptococci in Bulgaria from 1968 till 1996.
authors.affiliation: National Centre of Infectious and Parasitic Diseases, Sofia, Bulgaria.
authors.forename: A D
authors.initials: AD
authors.lastname: Detcheva
mesh_terms: D002031:Bulgaria / Q000453:epidemiology; D006801:Humans; D012189:Retrospective Studies; D016036:Seroepidemiologic Studies; D012703:Serotyping; D013290:Streptococcal Infections / Q000453:epidemiology* / Q000382:microbiology*; D013297:Streptococcus pyogenes / Q000145:classification* / Q000302:isolation & purification*