title: Isolation rates of Streptococcus pyogenes in patients with acute pharyngotonsillitis and among healthy school children in Iran.
abstract: We examined three populations from the Tehran region and the North part of Iran (Gilan), in all more than 5000 individuals, for carriage of Streptococcus pyogenes (group A streptococci; GAS). Children or adults with acute pharyngotonsillitis and healthy school children harboured GAS in 34-1, 20.0 and 21.0%, respectively. Typing of 421 randomly selected isolates showed a predominance of M-types M4, M5, M11, M12, as well as the provisional type 4245; however, many of the isolates were T and M non-typable. Forty-three percent of all strains were opacity factor (OF) negative. The type distribution differed markedly from that reported in 1973-4, when M types 1 and 12 were predominant.
authors.affiliation: Department of Medical Microbiology, University of Lund, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Jasir
authors.forename: A
authors.initials: A
authors.lastname: Noorani
authors.forename: A
authors.initials: A
authors.lastname: Mirsalehian
authors.forename: C
authors.initials: C
authors.lastname: Schalen
mesh_terms: D000293:Adolescent; D000328:Adult; D002353:Carrier State / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007492:Iran / Q000453:epidemiology; D007827:Laryngitis / Q000453:epidemiology / Q000382:microbiology*; D012703:Serotyping; D013290:Streptococcal Infections / Q000453:epidemiology* / Q000382:microbiology; D013297:Streptococcus pyogenes / Q000302:isolation & purification; D014069:Tonsillitis / Q000453:epidemiology / Q000382:microbiology*