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Studies on the Inhibition of Development of Ostertagia spp. in Lambs

Published online by Cambridge University Press:  18 November 2009

R. M. Connan
Affiliation:
Department of Animal Pathology, Madingley Road, Cambridge

Extract

Inhibition of development in the larvae of Ostertagia spp. infecting tracer lambs under field conditions shows a seasonal pattern (Connan, 1968) somewhat similar to that seen in O. ostertagi infections in calves (Anderson, Armour, Jennings, Ritchie and Urquhart, 1965). This finding also agrees with the seasonal appearance of dormant larvae in ewes (Soulsby, 1966; Connan, 1968) and one year old sheep (Parnell, 1962; James and Johnstone, 1967).

Type
Research Papers
Copyright
Copyright © Cambridge University Press 1969

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References

Anderson, N., Armour, J., Jennings, F. W., Ritchie, J. D. and Urquhart, G. M., 1965.—“Inhibited development of Ostertagia ostertagi.” Vet. Rec., 77, 146147.Google ScholarPubMed
Armour, J., Jarrett, W. F. H., Jennings, F. W., 1966.—“Experimental Ostertagia circumcincta infections in sheep: development and pathogenesis of a single infection.” Am. J. vet. Res., 27, 12671278.Google Scholar
Connan, R. M., 1968.—“Studies on the worm populations in the alimentary tract of breeding ewes”. J. Helminth., 42, 928.CrossRefGoogle ScholarPubMed
Dunsmore, J. D., 1960.—“Retarded development of Ostertagia species in sheep.” Nature, Lond., 186, 986987.CrossRefGoogle ScholarPubMed
James, P. S. and Johnstone, I. L., 1967.—“Studies with Ostertagia circumcincta in sheep. I. The epidemiology of mature adults and arrested larvae.” J. Helminth., 41, 137150.CrossRefGoogle Scholar
Parnell, I. W., 1962.—“Observations on the seasonal variations in the worm burdens of young sheep in Southern Western Australia.” J. Helminth., 36, 161188.CrossRefGoogle ScholarPubMed
Sommerville, R. I., 1954.—“The histotropic phase of the nematode parasite, Ostertagia circumcincta.” Aust. J. agric. Res., 5, 130140.CrossRefGoogle Scholar
Soulsby, E. J. L., 1906.—“The mechanisms of immunity to gastrointestinal nematodes.” In Biology of Parasites. Edited by Soulsby, E. J. L.Academic Press New York and London.Google Scholar