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The serotyping of hospital strains of streptococci belonging to Lancefield group C and group G

Published online by Cambridge University Press:  19 October 2009

Androulla Efstratiou
Androulla Efstratiou
Affiliation:
Streptococcus Reference Unit, Division of Hospital Infection, Central Public Health Laboratory, 175 Colindale Avenue, London NW9 5HT
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Summary

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A collection of more than 300 strains belonging to either Lancefield group C or group G was made. The cultures had been isolated either sporadically from patients with serious disease or as apparent clusters from various nosocomial outbreaks. T-protein antigens were sought. So far, nine distinct serotypes have been found among the group G streptococci and seven serotypes amongst the Streptococcus equisimilis (group C) strains. Of the sixteen serotypes, four were the original T-types 7, 16, 20 and 21 described by Griffith (1934). Because of the similarities of representatives of the two groups to Lancefield group A streptococci (Griffith, 1934; Maxted & Potter, 1967) a few strains not unexpectedly carried T antigens usually seen in group A streptococci. Using this scheme it has been possible to serotype 76% of S. equisimilis strains of human origin and 82% of group G streptococci from human clinical material. A small collection of group C and group G streptococci of animal origin could not be serotyped with the experimental T-antisera.

Type
Research Article
Information
Journal of Hygiene , Volume 90 , Issue 1 , February 1983 , pp. 71 - 80
Copyright
Copyright © Cambridge University Press 1983

References

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