1887

Abstract

SUMMARY: ‘Indifferent’ strains of streptococci-i.e. strains which give no haemolysis or greening on blood-agar plates-frequently occur in cultures from dental root-canals. A serological study of over 200 strains of these streptococci showed that about half of them belonged to Lancefield groups F, G or C. It was shown by cross-absorption that the group-antigen of indifferent streptococci of group F is identical with the group-antigen of haemolytic strains of group F. Apart from the group-antigen, five independent carbohydrate type-antigens, localized in the cell wall, were demonstrated in group F strains. These type-antigens were found in groups other than F, e.g. the type-antigen I was observed in haemolytic and indifferent strains of group G; the type-antigen III occurred in indifferent strains of group C. Several strains with a type-antigen but without group-antigens were observed. The presence of carbohydrate type-antigens in formamide extracts can cause confusing cross-reactions in the grouping procedure, unless strains without type-antigen are used for the preparation of sera.

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/content/journal/micro/10.1099/00221287-28-1-181
1962-04-01
2022-01-16
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References

  1. Bliss E. A. 1937; Studies upon minute hemolytic streptococci. III. Serological differentiation. J. Bact. 33:625
    [Google Scholar]
  2. Fuller A. T. 1938; The formamide method for the extraction of polysaccharides from haemolytic streptococci. Brit. J. exp. Path. 19:130
    [Google Scholar]
  3. Lancefield R. C. 1955; Technical procedures employed in the production and use of Streptococcus grouping sera. Circular issued by The Hospital of the Rockefeller Institute, May 1955
    [Google Scholar]
  4. de Moor C. E. 1960; Streptokokken onderzoek in 1959. Versl. Volksgezondh.1763
    [Google Scholar]
  5. Ottens H. 1961 Indifferente en haemolytische streptococcen met groepsantigeen F. Thesis, Utrecht
    [Google Scholar]
  6. Scheidegger J. J. 1955; Une micro-méthode de l’immuno-électrophorese. Int. Arch. Allergy, Basel 7:103
    [Google Scholar]
  7. Schottmüller H. 1903 Münch. med. Wschr. 50:849–909
    [Google Scholar]
  8. Seelemann M., Obiger G. 1958; Über die Herstellung gruppenspezifischer Seren zur Streptokokken-Differenzierung. Z. Hyg. InfektKr. 144:503
    [Google Scholar]
  9. Sneath P. H. A. 1957; Some thoughts on bacterial classification. J. gen. Microbiol. 17:184
    [Google Scholar]
  10. Winkler K. C., van Amerongen J. 1959; Bacteriological results from 4000 root canal cultures. Oral Surg. 12:857
    [Google Scholar]
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