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Some observations on the free-living stages of Ostertagia ostertagi, a stomach worm of cattle

Published online by Cambridge University Press:  06 April 2009

J. H. Rose
J. H. Rose
Affiliation:
Ministry of Agriculture, Fisheries and Food Central Veterinary Laboratory, Weybridge
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Extract

Outdoor observations were made on the rate of development of the free-living stages of O. ostertagi at different times of the year, and on the migratory activities and longevity of the larvae in faeces, on herbage and in soil.

The effect of temperature on the rate of development of eggs and larvae in faeces, and the effect of temperature and humidity on the longevity of eggs and larvae when separated from faeces, were studied in the laboratory.

The results of these observations are discussed in relation to translation (that is, the process whereby eggs in faeces become infective larvae on herbage available to the grazing animal) and to the transmission of infection in the field.

I wish to thank Mr J. F. Michel for providing the infected faeces, and Mr D. A. Griffiths for technical assistance.

Type
Research Article
Information
Parasitology , Volume 51 , Issue 3-4 , November 1961 , pp. 295 - 307
Copyright
Copyright © Cambridge University Press 1961

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References

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