Hostname: page-component-848d4c4894-x5gtn Total loading time: 0 Render date: 2024-06-02T03:28:28.784Z Has data issue: false hasContentIssue false
  • English
  • Français

The counting of surface colonies of bacteria

Published online by Cambridge University Press:  15 May 2009

P. B. Crone
P. B. Crone
Affiliation:
From the Public Health Laboratory, Newcastle upon Tyne
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.

A colony count performed by spreading a known volume of suspension on the surface of a plate possesses certain advantages over other methods, of which the chief is ease of counting.

The distribution of counts of several samples of the same suspension on medium of the same age and batch is as expected on statistical grounds.

Different batches and ages of blood plates may give substantially the same count but this is not true for Leifson's and Wilson & Blair's media.

A diluting fluid, which is satisfactory if blood agar is the plating medium, may not necessarily be so if special media are to be used.

Type
Research Article
Information
Journal of Hygiene , Volume 46 , Issue 4 , December 1948 , pp. 426 - 430
Copyright
Copyright © Cambridge University Press 1948

References

REFERENCES

Fisher, R. A. (1944). Statistical methods for Research Workers, 9th ed. London.Google Scholar
Fisher, R. A., Thornton, H. G. & MacKenzie, W. A. (1922). J. Ann. appl. Biol. 9, 325.Google Scholar
Miles, A. A. & Misra, S. S. (1938). J. Hyg., Camb., 38, 732.Google Scholar
Snyder, T. L. (1947). J. Bact. 54, 641.Google Scholar
Wilson, G. S. (1922). J. Bact. 7, 405.Google Scholar