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Effects of different levels of nutrition and continuing dosing of poultry with Ascaridia galli eggs on the subsequent development of parasite populations

Published online by Cambridge University Press:  06 April 2009

M. M. Ikeme
M. M. Ikeme
Affiliation:
University of Edinburgh, Department of Zoology
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Summary

The population dynamics of Ascaridia galli infections of poultry was studied under repeated doses of 10, 100 and 1000 eggs. Daily doses were continued for 6 weeks only. At low dose rates patency is noted by the fifth week. At higher dose rates there is an accumulation of larvae whose development has been arrested at a precise developmental stage, i.e. the third larval stage. Sporadic development of some of these larvae to adults occurs later. Arguments are produced to show that this inhibition of larval development is a resistance and not a density-dependent phenomenon. The epidemiological significance of this inhibition is discussed. This resistance phenomenon is shown to occur in single infection experiments where 1000 eggs were used. This gives rise to the development of a worm population of two facies. The whole finding is suggested to be related in some way to the phenomenon of ‘tissue phase’, which is accepted as a normal life-cycle behaviour of this parasite. A brief review of previous work on this is given and it is postulated that the ‘tissue phase’ phenomenon is not an obligatory part of the normal life-cycle of the parasite but represents a reaction to factors of resistance inherent in chickens and controlled to a large extent by a complex dynamic interplay of dose size and the chickens.

I wish to thank the Department of Technical Co-operation and the Federal Government of Nigeria for financing this project, Dr Boulton of the Poultry Research Centre, Edinburgh, for advice on nutrition, and the Department of Zoology, especially Dr J. A. Campbell, University of Edinburgh, for facilities and advice on the work. I am greatly indebted to the Ministry of Agriculture, Fisheries and Food, Poultry Research Laboratories, Lasswade, for the free supply of chickens used in this work.

Information

Type
Research Article
Information
Parasitology , Volume 63 , Issue 2 , October 1971 , pp. 233 - 250
Copyright
Copyright © Cambridge University Press 1971

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References

REFERENCES

Ackert, J. E. & Tugwell, R. (1948). Tissue phase of Ascaridia galli life cycle elucidated by artificial digestion apparatus. Journal of Parasitology 34 (supplementyes), 32.Google Scholar
Dunsmore, T. D. (1960). Retarded development of Ostertagia species in sheep. Nature (London) 186, 986–7.CrossRefGoogle ScholarPubMed
Fairbairn, D. (1961). The in vitro hatching of Ascaris lumbricoideseggs. Canadian Journal of Zoology 39, 153–60.CrossRefGoogle Scholar
Field, A. C., Brambell, M. R. & Campbell, J. A. (1960). Spring rise in faecal worm-egg counts of housed sheep, and its importance in nutritional experiments. Parasitology 50, 387–99.Google Scholar
Hansen, M. F., Olsen, L. J. & Ackert, J. E. (1954). Improved techniques for culturing and administering ascarid eggs to experimental chickens. Experimental Parasitology 3, 464–8.CrossRefGoogle Scholar
Hart, J. A. (1964). Observations on the dry season strongyle infestations of Zebu cattle in Northern Nigeria. British Veterinary Journal 120, 87–95.Google Scholar
Ikeme, M. M. (1964). Studies on Ascaridia galli (Schrank, 1788). (Nematoda: Ascaroidea) in domestic fowls with particular reference to the dynamics of parasite populations in relation to continuing challenge of the host. Ph.D. thesis, Edinburgh University.Google Scholar
Kotlan, A. (1949). The developmental and pathological significance of the histotrophic phase in parasitic nematodes. Report of the 14th International Veterinary Congress 2, 61.Google Scholar
Madsen, H. (1962 a). On the interaction between Heterakis gallinarum, Ascaridia galli, ‘Blackhead’ and the chicken. Journal of Helminthology 36, 107–10.Google Scholar
Madsen, H. (1962 b). The so-called tissue-phase in nematodes. Journal of Helminthology 36, 143–4.Google Scholar
Michel, J. F. (1952). Inhibition of development of Trichostrongylus retortaeformis. Nature (London) 169, 933–4.CrossRefGoogle ScholarPubMed
Michel, J. F. (1955). Studies on host resistance to Dictyocaulus infection. I. The phenomenon of inhibited development. Journal of Comparative Pathology and Therapeutics 65, 149–58.Google Scholar
Michel, J. F. (1963).Host resistance and infection of Ostertagia ostertagi in calves. Parasitology 53, 63–84.CrossRefGoogle Scholar
Moran, J. F. & Mizella, J. D. (1956). Studies on Ascaridia galli (Schrank 1788). American Midland Naturalist 58, 170–81.Google Scholar
Roberts, F. H. S. (1937).Studies on the biology and control of the large round worm of fowls Ascaridia galli (Schrank 1788) Freeborn 1923. Queensland Department of Agriculture and Stock Bulletin, no. 2.Google Scholar
Sadun, E. H. (1948). Resistance induced in chickens by infections with the nematode Ascaridia galli. American Journal of Hygiene 47, 282–9.Google Scholar
Sommerville, R. E. (1960). The growth of Cooperia curtecei, a nematode parasite of sheep. Parasitology 50, 261–7.Google Scholar
Taylor, E. L. & Michel, J. F. (1952). Inhibited development of Dictyocaulus larvae in the lungs of cattle and sheep. Nature (London) 169, 753.Google Scholar
Todd, A. C. & Crowdus, D. H. (1952). On the life history of Ascaridia galli. Transactions of the American Microscopical Society 71, 282–7.Google Scholar
Twohy, D. W. (1956). The early migration and growth of Nippostrongylus muris in the rat. American Journal of Hygiene 63, 165–85.Google Scholar