title: [The OF characteristics of streptococci group A and immunity to streptococcal infection based on the results of OF and anti-OF tests].
abstract: The influence of the OF activity of group A streptococci on their specific pathogenic properties has been shown, which is manifested by increased virulence of these streptococci for children of younger age groups and by a two times higher isolation rate of OF+ strains in tonsillitis than in scarlet fever. The possibility of the indirect evaluation of the content of anti-M-antibodies by the results of the anti-OF test has been revealed, which permits using this test instead of the bactericidal test, more complicated, in the study of immunity to infection induced by group A OF+ streptococci. Among the main methods of laboratory support of epidemiological surveillance on streptococcal infection, the introduction of the highly discriminating OF typing and the anti-OF test into practical use is recommended.
authors: I A
authors: IA
authors: Krasil'nikov
authors: I M
authors: IM
authors: Iontova
authors: I V
authors: IV
authors: Beliakova
authors: A A
authors: AA
authors: Sobolevskaia
authors: A K
authors: AK
authors: Zubov
authors: T M
authors: TM
authors: Stepanova
authors: N I
authors: NI
authors: Fomina
authors: A A
authors: AA
authors: Totolian
mesh_terms: D000907:Antibodies, Bacterial / Q000097:blood*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007109:Immunity / Q000276:immunology; D007223:Infant; D010447:Peptide Hydrolases / Q000097:blood* / Q000276:immunology; D012426:Russia; D012541:Scarlet Fever / Q000276:immunology; D012703:Serotyping; D013290:Streptococcal Infections / Q000276:immunology*; D013297:Streptococcus pyogenes / Q000145:classification / Q000276:immunology* / Q000302:isolation & purification / Q000472:pathogenicity; D014505:Urban Population; D014774:Virulence / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; C021908:opacity factor; D010447:Peptide Hydrolases
vernacular_title: OF-kharakteristika streptokokkov gruppy A i immunitet k streptokokkovoĭ infektsii po rezul'tatam OF- i anti-OF-testov.