Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-22T05:46:38.192Z Has data issue: false hasContentIssue false
  • English
  • Français

The nature of the opaque colony variation in group A streptococci*

Published online by Cambridge University Press:  15 May 2009

Maclyn McCarty
Maclyn McCarty
Affiliation:
The Rockefeller University, New York
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Opaque colonies of group A streptococci, detected on clear agar plates with obliquely transmitted light, are composed of extremely long chains of cocci. The mucopeptide layer of the cell-wall is involved in the formation of enhanced intercellular bridges. It is suggested that this exaggerated chaining results in an altered growth pattern which gives the appearance of granular opacity to surface colonies.

Type
Research Article
Information
Journal of Hygiene , Volume 64 , Issue 2 , June 1966 , pp. 185 - 190
Copyright
Copyright © Cambridge University Press 1966

References

REFERENCES

Freimer, E. H., Krause, R. M. & McCarty, M. (1959). Studies of L forms and protoplasts of group A streptococci. I. Isolation, growth and bacteriologic characteristics. J. exp. Med. 110, 853.CrossRefGoogle Scholar
Gooder, H. & Maxted, W. R. (1961). External factors influencing structure and activities of Streptococcus pyogenes. In Microbial Reaction to Environment. Symp. Soc. gen. Microbiol. 11, 151.Google Scholar
Griffith, F. (1934). The serological classification of Streptococcus pyogenes. J. Hyg., Oamb., 34, 542.Google ScholarPubMed
Krause, R. M. & McCarty, M. (1961). Studies on the chemical structure of the streptococcal cell wall. I. Identification of a mucopeptide in the cell walls of groups A and A-variant streptococci. J. exp. Med. 114, 127.CrossRefGoogle Scholar
Wilson, A. T. (1959). The relative importance of the capsule and the M-antigen in determining colony form of group A streptococci. J. exp. Med. 109, 257.CrossRefGoogle ScholarPubMed