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The Relation of Concentration of Food Supply to the Generation-time of Bacteria

Published online by Cambridge University Press:  15 May 2009

W. J. Penfold  and
Dorothy Norris
W. J. Penfold
Affiliation:
(From the Bacteriological and Biochemical Departments, The Lister Institute, London.)
Dorothy Norris
Affiliation:
(From the Bacteriological and Biochemical Departments, The Lister Institute, London.)
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1. The generation-time of B. typhosus in 1% peptone at 37°C. is 40 minutes.

2. The rate of growth of B. typhosus is greatly influenced by the concentration of peptone in nutrient medium when the peptone is below 0·4%.

3. Below 0·2% the generation-time is inversely proportional to the concentration of peptone used.

4. The addition of 0·175% of glucose to a medium containing only 0·1% of peptone lowers the generation-time by about 50% With 1·0% peptone this effect is less marked.

Type
Research Article
Information
Journal of Hygiene , Volume 12 , Issue 4 , December 1912 , pp. 527 - 531
Copyright
Copyright © Cambridge University Press 1912

References

REFERENCES

Hehewerth, (1901). Die mikroskopische Zählungsmethode der Bakterien u.s.w. Arch. f. Hyg. XXXIX. 321.Google Scholar
Lane-Claypon, (1909). Multiplication of bacteria etc. Journ. of Hyg. IX. 239.CrossRefGoogle Scholar
Penfold, (1911). Studies in bacterial variation. Journ. of Hyg. XI. 30.CrossRefGoogle Scholar