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Inhibition of development of Ostertagia ostertagi – effect of temperature on the infective larval stage

Published online by Cambridge University Press:  06 April 2009

M. G. Smeal
Affiliation:
New South Wales Department of Agriculture, Veterinary Research Station, Glenfield, New South Wales 2167, Australia
A. D. Donald
Affiliation:
C.S.I.R.O. Division of Animal Health, McMaster Laboratory, Glebe, New South Wales 2037, Australia.

Summary

Populations of Ostertagia ostertagi established from fresh larvae and from larvae stored at 4 °C for up to 12 weeks contained about 10% inhibited early 4th-stage larvae. This value rose to 21% after 16 weeks, due to an increase in numbers of inhibited larvae while adult numbers remained unchanged. Storage at 15 °C had no effect. In the case of larvae stored at 4 °C for 8 weeks, increasing the larval dose to 90000 had no significant effect on the proportion of the dose which was inhibited. The response to low temperature storage was much weaker than in previously reported studies on British populations, which accords with our earlier conclusion that low temperature cannot be the effective stimulus for inhibition in Australia.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1982

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References

Armour, J. (1970). Bovine ostertagiasis: a review. Veterinary Record 86, 184–90.CrossRefGoogle ScholarPubMed
Armour, J. (1978). Arrested development in cattle nematodes with special reference to Ostertagia ostertagi. In Facts and Reflections III, Workshop on ‘Arrested Development of Nematodes in Sheep and Cattle’ (ed. Borgsteede, F. H. M.). Central Veterinary Institute, Lelystad, The Netherlands.Google Scholar
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). 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. (1978). Topical themes in the study of arrested development. In Facts and Reflections III. Workshop on ‘Arrested Development of Nematodes in Sheep and Cattle’ (ed. Borgsteede, F. H. M.). Central Veterinary Institute, Lelystad, The Netherlands.Google Scholar
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
Smeal, M. G. (1977). Studies on inhibited development of nematode parasites in cattle. Ph.D. thesis, University of Sydney.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., Fraser, G. C. & Robinson, G. G. (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 ofbeef cattle in New South Wales. Australian Veterinary Journal 56, 74–9.CrossRefGoogle Scholar
Wright, S., Armour, J. & Bruce, R. G. (1973). Inhibited development of Ostertagia ostertagi. Parasitology 67, xvi–xvii.Google Scholar