title: [Toxin B and A production by beta-hemolytic streptococci isolated from scarlet fever patients].
abstract: This work was aimed at the study of the frequency of isolation of beta-hemolytic streptococci from the patients suffering from scarlet fever, producing A and B toxins. Toxigenicity of the microbes was studied in the indirect agglutination test. In 68.4 per cent of cases there were isolate streptococci producing toxin A, and in 22.8 per cent--toxin B. The percentage of strongly toxigenic A-strains constituted 28.2, and of B-strains--0.6. The greatest incidence of the A and B toxigenic streptococci was observed during the autumn-winter period. Among the strains of the 4th--"leading" serological type there were the greatest number of the A-toxigenic variants, and among the streptococci belonging to the I serological type--of the B-toxigenic strains.
mesh_terms: D003429:Cross Reactions; D003470:Culture Media; D006386:Hemagglutination Tests; D006801:Humans; D009031:Moscow; D009500:Neutralization Tests; D012541:Scarlet Fever / Q000382:microbiology*; D012621:Seasons; D013291:Streptococcus / Q000302:isolation & purification / Q000472:pathogenicity*; D014118:Toxins, Biological / Q000096:biosynthesis*
chemical_list: D003470:Culture Media; D014118:Toxins, Biological
vernacular_title: Produktsiia toksina B i A beta-gemoliticheskimi streptokokkami, vydelennymi ot bol'nykh skarlatinoĭ