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Contributions to the Experimental Study of Epidemiology. Further Observations on the Effect of Vaccination on Herd Mortality

Published online by Cambridge University Press:  15 May 2009

M. Greenwood ,
W. W. C. Topley  and
J. Wilson
M. Greenwood
Affiliation:
(From the London School of Hygiene and Tropical Medicine.)
W. W. C. Topley
Affiliation:
(From the London School of Hygiene and Tropical Medicine.)
J. Wilson
Affiliation:
(From the London School of Hygiene and Tropical Medicine.)
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In the last memoir of this series (Greenwood, Topley and Wilson, 1931) we discussed at some length the modifications of the course of herd sickness effected by immunisation of entrants to the herds. Briefly, these were our conclusions: efficient artificial immunisation (the criteria of efficiency being the usual standardising methods of a laboratory) confers a considerable temporary advantage upon mice entering an infected herd. The risk of death during the period of herd life when the rate of mortality is especially high is greatly reduced, so that when one has the case of a herd or group temporarily exposed to special risks, the value of the expedient is very great. But no method of artificial immunisation we have tried will render the immunised animals impervious to the risks which their membership of the herd entails.

Type
Research Article
Information
Journal of Hygiene , Volume 31 , Issue 4 , October 1931 , pp. 484 - 492
Copyright
Copyright © Cambridge University Press 1931

References

REFERENCES

Greenwood, M., Topley, W. W. C. and Wilson, J. (1931). J. Hygiene, 31, 257.CrossRefGoogle Scholar
Pijper, A. and Dau, H. (1930). Brit. J. Exp. Path. 11, 112.Google Scholar
Topley, W. W. C. (1929). Lancet, i, 1337.Google Scholar