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The response of Awassi sheep to re-infection with Haemonchus contortus larvae

Published online by Cambridge University Press:  06 April 2009

K. I. Altaif ,
S. N. Al-Abbassy  and
H. B. Abboud
K. I. Altaif
Affiliation:
Department of Parasitology, College of Veterinary Medicine, University of Baghdad, Al-Ameria (Iraq)
S. N. Al-Abbassy
Affiliation:
Department of Parasitology, College of Veterinary Medicine, University of Baghdad, Al-Ameria (Iraq)
H. B. Abboud
Affiliation:
Department of Parasitology, College of Veterinary Medicine, University of Baghdad, Al-Ameria (Iraq)
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Summary

The response of Awassi sheep to primary infection with 10000 Haemonchus contortus larvae and subsequent challenge with 20000 larvae was studied. Two types of response to re-infection were observed. The first, characterized by a sharp decline in egg counts, progressive improvement in packed cell volume (PCV) and a marked loss of adult worms and challenge larvae, was considered as self-cure and protection. In the second type of response there was a temporary decline in egg counts, no improvement in PCV and necropsy findings indicated hyperinfection with challenge larvae.

Type
Research Article
Information
Parasitology , Volume 80 , Issue 2 , April 1980 , pp. 233 - 240
Copyright
Copyright © Cambridge University Press 1980

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References

Al-Khshali, M. (1978). A comparative study on the resistance of Awassi and Merino sheep to infection with Haemonchus contortus in Iraq, Ph.D. Thesis, Baghdad University, Baghdad.Google Scholar
Allonby, E. W. & Urquhart, G. M. (1973). Self-cure of Haemonchus contortus infection under field conditions. Parasitology 66, 43–53.CrossRefGoogle ScholarPubMed
Altaif, K. I. & Dargie, J. D. (1978). Genetic resistance to helminths. The influence of breed and haemoglobin type on the response of sheep to re-infections with Haemonchus contortus. Parasitology 77, 177–187.CrossRefGoogle ScholarPubMed
Dargie, J. D. & Allonby, E. W. (1975). Pathophysiology of single and challenge infections of Haemonchus contortus in Merino sheep: studies on red cell kinetics and the “self-cure” phenomenon. International Journal for Parasitology 5, 147–57.CrossRefGoogle ScholarPubMed
Gordon, H. McL. (1948). The epidemiology of parasitic diseases with special reference to studies with nematode parasites of sheep. Australian Veterinary Journal 24, 17–45.CrossRefGoogle Scholar
Gordon, H. McL. (1950). Some aspects of parasitic gastro-enteritis of sheep. Australian Veterinary Journal 26, 14–98.CrossRefGoogle ScholarPubMed
Gordon, H. McL. (1967). Self-cure reaction. In The Reaction of the Host to Parasitism. Proceedings of the 3rd International Conference of the World Association for the Advancement of Veterinary Parasitology (ed. Soulsby, E. J. L.), pp. 174–190. Veterinary Medical Review.Google Scholar
Jilek, A. F. & Bradley, R. E. (1969). Haemoglobin types and resistance to Haemonchus contortus in sheep. American Journal of Veterinary Research 30, 1773–8.Google ScholarPubMed
Lopez, V. & Urquhart, G. M. (1967). The immune response of Merino sheep to Haemonchus contortus infection. In The Reaction of the Host to Parasitism. Proceedings of the 3rd International Conference of the World Association for the Advancement of Veterinary Parasitology (ed. Soulsby, E. J. L.), pp. 153–159. Veterinary Medical Review.Google Scholar
Ritchie, J. S. D., Anderson, N., Armour, J., Jarrett, W. F. H., Jennings, F. W. & Urquhart, G. M. (1966). Experimental Ostertagia ostertagi infections in calves: parasitology and pathogenesis of a single infection. American Journal of Veterinary Research 27, 659–67.Google ScholarPubMed
Smithies, O. (1955). Zone electrophoresis in starch gels: group variations in the serum proteins of normal human adults. Biochemical Journal 61, 629–41.CrossRefGoogle ScholarPubMed
Soulsby, E. J. L. & Stewart, D. F. (1960). Serological studies of the self-cure reaction in sheep infected with Haemonchus contortus. Australian Journal of Agricultural Research 11, 595–603.CrossRefGoogle Scholar
Stewart, D. F. (1950). Studies on resistance of sheep to infestation with Haemonchus contortus and Trichostrongylus spp. and immunological reactions of sheep exposed to infestation. IV. The nature of the self-cure phenomenon. Australian Journal of Agricultural Research 1, 427–39.CrossRefGoogle Scholar
Stewart, D. F. (1953). Studies on resistance of sheep to infestation with Haemonchus contortus and Trichostrongylus spp. and on the immunological reactions of sheep exposed to infestation. V. The nature of self-cure phenomenon. Australian Journal of Agricultural Research 4, 100–17.CrossRefGoogle Scholar
Stewart, D. F. (1955). Self-cure in nematode infestations of sheep, Nature, London 175, 1273–4.CrossRefGoogle Scholar
Stoll, N. R. (1929). Studies with the Strongyloid nematode Haemonchus contortus. 1. Acquired resistance of hosts under natural reinfection conditions out of doors. American Journal of Hygiene 10, 384–418.Google Scholar