title: Molecular comparison of group A streptococci of T1M1 serotype from invasive and noninvasive infections in Finland.
abstract: A total of 98 isolates of group A streptococci of T1M1 serotype isolated in Finland during 1988-1995 from bacteremic, pharyngeal, and pyogenic infections were studied by molecular means. The typing techniques used included restriction endonuclease analysis, ribotyping, and random amplified polymorphic DNA analysis. Representatives of each observed genotype were also examined for carriage of the speA gene encoding for pyrogenic exotoxin A. All of the serotype T1M1 isolates studied were considered to be of a single clonal origin, and 66% were identical by all three genotyping techniques used. Among the remaining 34% of closely related isolates, 13 different genotypes were detected. All isolates studied carried the speA gene. No evidence was found of correlation of the genomic type to the severity of the infection or the time of isolation.
authors.affiliation: National Public Health Institute, Department of Bacteriology, Helsinki, Finland.
authors.forename: A
authors.initials: A
authors.lastname: Muotiala
authors.forename: H
authors.initials: H
authors.lastname: Seppälä
authors.forename: P
authors.initials: P
authors.lastname: Huovinen
authors.forename: J
authors.initials: J
authors.lastname: Vuopio-Varkila
mesh_terms: D016470:Bacteremia / Q000453:epidemiology / Q000382:microbiology; D001426:Bacterial Proteins; D004269:DNA, Bacterial / Q000032:analysis*; D005098:Exotoxins / Q000235:genetics; D005387:Finland / Q000453:epidemiology; D006801:Humans; D008565:Membrane Proteins; D017720:Molecular Epidemiology; D010612:Pharyngitis / Q000453:epidemiology / Q000382:microbiology; D012150:Polymorphism, Restriction Fragment Length; D012335:RNA, Ribosomal / Q000235:genetics; D019105:Random Amplified Polymorphic DNA Technique; D013290:Streptococcal Infections / Q000453:epidemiology* / Q000235:genetics*; D013297:Streptococcus pyogenes / Q000235:genetics*; D013492:Suppuration / Q000453:epidemiology / Q000382:microbiology
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D005098:Exotoxins; D008565:Membrane Proteins; D012335:RNA, Ribosomal; C117980:SpeA protein, Streptococcus pyogenes; C027951:erythrogenic toxin