Hostname: page-component-84b7d79bbc-2l2gl Total loading time: 0 Render date: 2024-07-26T05:41:43.540Z Has data issue: false hasContentIssue false
  • English
  • Français

Inhibited development of Ostertagia ostertagi in Australia related to survival over summer in the host or on pasture

Published online by Cambridge University Press:  06 April 2009

M. G. Smeal  and
A. D. Donald
M. G. Smeal
Affiliation:
New South Wales Department of Agriculture, Central Veterinary Laboratory, Glenfield, New South Wales 2167, Australia
A. D. Donald
Affiliation:
CSIRO Division of Animal Health, McMaster Laboratory, Glebe, New South Wales 2037, Australia
Get access Rights & Permissions [Opens in a new window]

Summary

During autumn and winter, separate pasture plots were seeded with Ostertagia ostertagi eggs produced by worms which had persisted in the host over summer as inhibited larvae, or which had developed directly from larvae acquired from pasture in late summer. Successive groups of parasite-free calves grazed the plots in spring for 14 days at 4-week intervals and were killed for worm counts 14 days after removal from pasture. The proportion of inhibited early 4th-stage larvae was substantially greater in calves which grazed the plot carrying the progeny of previously inhibited worms. This finding is more easily reconciled with differential survival on pasture over spring and summer of inhibiting and non-inhibiting morphs, than with the concept of a physiological switch from inhibiting to non-inhibiting behaviour in individual larvae.

Type
Research Article
Information
Parasitology , Volume 89 , Issue 3 , December 1984 , pp. 597 - 602
Copyright
Copyright © Cambridge University Press 1984

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, N., Armour, J., Jennings, F. W., Ritchie, J. S. D. & Urquhart, G. M. (1969). The sequential development of naturally occurring ostertagiasis in calves. Research in Veterinary Science 10, 18–28.CrossRefGoogle ScholarPubMed
Armour, J. & Bruce, R. G. (1974). Inhibited development in Ostertagia ostertagi infections—a diapause phenomenon in a nematode. Parasitology 69, 161–74.CrossRefGoogle Scholar
Armour, J., Jennings, F. W. & Urquhart, G. M. (1969 a). Inhibition of Ostertagia ostertagi at the early fourth larval stage. I. The seasonal incidence. Research in Veterinary Science 10, 232–7.CrossRefGoogle Scholar
Armour, J., Jennings, F. W. & Urquhart, G. M. (1969 b). Inhibition of Ostertagia ostertagi at the early fourth larval stage. — II. The influence of environment on host or parasite. Research in Veterinary Science 10, 238–44.CrossRefGoogle ScholarPubMed
Michel, J. F., Lancaster, M. B. & Hong, C. (1973). Inhibition of development: variation within a population of Ostertagia ostertagi. Journal of Comparative Pathology 83, 351–6.CrossRefGoogle ScholarPubMed
Michel, J. F., Lancaster, M. B. & Hong, C. (1974). Studies on arrested development of Ostertagia ostertagi and Cooperia oncophora. Journal of Comparative Pathology 84, 539–54.CrossRefGoogle ScholarPubMed
Michel, J. F., Lancaster, M. B. & Hong, C. (1975). Arrested development of Ostertagia ostertagi and Cooperia oncophora. Effect of temperature at the free-living stage. Journal of Comparative Pathology 85, 133–8.CrossRefGoogle Scholar
Michel, J. F., Lancaster, M. B. & Hong, C. (1976). Observations on the resumed development of arrested Ostertagia ostertagi in naturally infected yearling cattle. Journal of Comparative Pathology 86, 73–80.CrossRefGoogle ScholarPubMed
Reid, J. F. S., Armour, J., Jennings, F. W. & Urquhart, G. M. (1968). Efficacy of tetramisole-studies on the efficacy of tetramisole in the treatment of pre-type II and type II bovine ostertagiasis. Veterinary Record 83, 14–16.Google Scholar
Smeal, M. G. & Donald, A. D. (1981). Effects on inhibition of development of the transfer of Ostertagia ostertagi between geographical regions of Australia. Parasitology 82, 389–99.CrossRefGoogle ScholarPubMed
Smeal, M. G. & Donald, A. D. (1982 a). Inhibited development of Ostertagia ostertagi in relation to production systems for cattle. Parasitology 85, 21–5.CrossRefGoogle ScholarPubMed
Smeal, M. G. & Donald, A. D. (1982 b). Inhibition of development of Ostertagia ostertagi — effect of temperature on the infective larval stage. Parasitology 85, 27–32.CrossRefGoogle ScholarPubMed
Smeal, M. G., Fraser, G. C. & Robinson, G. C. (1980). Seasonal changes in the structure of nematode populations of cattle in New South Wales in relation to inhibited larval development. Australian Veterinary Journal 56, 80–6.CrossRefGoogle ScholarPubMed
Smeal, M. G., Hotson, I. K., Mylrea, P. J., Jackson, A. R., Campbell, N. J. & Kirton, H. C. (1977). Studies on nematode infections of beef cattle in New South Wales. Australian Veterinary Journal 53, 566–74.CrossRefGoogle ScholarPubMed