Hostname: page-component-848d4c4894-m9kch Total loading time: 0 Render date: 2024-05-17T23:16:25.120Z Has data issue: false hasContentIssue false
  • English
  • Français

The development, composition and maintenance of experimental populations of Haemonchus contortus in sheep

Published online by Cambridge University Press:  06 April 2009

W. J. Coadwell  and
P. F. V. Ward
W. J. Coadwell
Affiliation:
Biochemistry Department, ARC Institute of Animal Physiology, Babraham, Cambridge CB2 4AT
P. F. V. Ward
Affiliation:
Biochemistry Department, ARC Institute of Animal Physiology, Babraham, Cambridge CB2 4AT
Get access Rights & Permissions [Opens in a new window]

Summary

Clun Forest sheep, aged between 3 and 18 months and worm-free from birth, were given a single dose of 25000 infective larvae of the nematode Haemonchus contortus. The host animals were killed between 4 and 100 days after infection and the nematode populations were examined to determine size and composition. The relation between worm body length, dry weight and age was studied and growth curves were constructed. Variations in the sex ratio for infections of different ages were noted. No evidence was found for a relation between rate of growth and population density. The rate of expulsion was determined and its variability discussed.

Type
Research Article
Information
Parasitology , Volume 82 , Issue 2 , April 1981 , pp. 257 - 261
Copyright
Copyright © Cambridge University Press 1981

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Anderson, R. M. & Michel, J. F. (1977). Density-dependent survival in populations of Ostertagia ostertagi. International Journal for Parasitology 7, 321–9.CrossRefGoogle ScholarPubMed
Coadwell, W. J. & Ward, P. F. V. (1975). Observations on the development of Haemonchus contortus in young sheep given a single infection. Parasitology 71, 505–15.CrossRefGoogle Scholar
Coadwell, W. J. & Ward, P. F. V. (1977). Annual variation in the growth of Haemonchus contortus in experimental infections of sheep and its relation to arrested development. Parasitology 74, 121–32.CrossRefGoogle Scholar
Pollard, S. H. (1979). A Handbook of Numerical and Statistical Techniques, pp. 196–8. Cambridge: Cambridge University Press.Google Scholar
Ractliffe, L. H., LeJambre, L. F., Uhazy, L. S. & Whitlock, J. H. (1971). Density dependence of the weight of Haemonchus contortus adults. International Journal for Parasitology 1, 297–301.CrossRefGoogle ScholarPubMed