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Studies on Eimeria grenieri in the guinea fowl (Numida meleagris)

Published online by Cambridge University Press:  06 April 2009

P. L. Long
Affiliation:
Houghton Poultry Research Station, Houghton, Huntingdon, Cambs. PE17 2DA
B. J. Millard
Affiliation:
Houghton Poultry Research Station, Houghton, Huntingdon, Cambs. PE17 2DA

Summary

Eimeria grenieri was isolated from intensively reared guinea fowl in Britain. The oocysts had average dimensions of 21·09 × 15·48 μm and a small micropyle. Three generations of schizonts were found in the small intestine. The first mature schizonts were found in the upper intestine 30 h after inoculation. Second-generation schizonts were seen 48–80 h and third-generation schizonts were present 80–96 h after inoculation. These schizonts were found in the middle and lower small intestine. It was confirmed that gametogony of this species occurs only in the caeca. The pre-patent time was 112 h and the reproductive index from a dose of 6 × 102 oocysts was 8 × 104. Doses of between 1 × 104 and 1 × 106 caused severe depression of body weight gain. Immunity to re-infection developed rapidly. Sulphaquinoxaline at a dose of 0·04% in the drinking water given after inoculation was effective in reducing the pathogenic effects of the disease. Robenidine given in the food at a concentration of 16·5 ppm (50% of the recommended concentration for chickens) was effective in preventing disease caused by E. grenieri.

The endogenous life-cycle of E. grenieri was completed in the chorioallantoic membrane of developing chicken embryos.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1978

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References

REFERENCES

Cooper, D. M. & Timms, J. R. (1972). The rearing and maintenance of breeding chickens in isolators. I. Glassfibre isolators. Avian Pathology 1, 4757.CrossRefGoogle Scholar
Davies, S. F. M. (1956). Intestinal coccidiosis in chickens caused by Eimeria necatrix. Veterinary Record 68, 853–7.Google Scholar
Fitzgerald, P. R. (1970). Development of Eimeria stiedai in avian embryos. Journal of Parasitology 56, 1252–3.CrossRefGoogle Scholar
Fouré, N. (1975). Etude de l'innocuite et de l'activite de la robenidine chez la pintade. Bulletin d'Information Station Experimentale d'Aviculture de Ploufragan 15, 124–31.Google Scholar
Long, P. L. (1970). Some factors affecting the severity of infection with Eimeria tenella in chicken embryos. Parasitology 60, 435–47.CrossRefGoogle ScholarPubMed
Long, P. L. (1972). Observations on the oocyst production and viability of Eimeria mivati and E. tenella in the chorioallantois of chicken embryos incubated at different temperatures. Zeitschrift für Parasitenkunde 39, 2737.CrossRefGoogle Scholar
Long, P. L. & Millard, B. J. (1975). Pathogenicity, immunogenicity and site specificity of an attenuated strain of Eimeria tenella. Journal of Protozoology 22, 53A.Google Scholar
Long, P. L., Joyner, L. P., Millard, B. J. & Norton, C. C. (1976). A guide to laboratory techniques used in the study and diagnosis of avian coccidiosis. Folia Veterinaria Latina 6, 201–17.Google Scholar
Pellerdy, L. P. (1974). Coccidia and Coccidiosis. Berlin and Hamburg: Verlag Paul Parey.Google Scholar
Rollinson, D. (1976). Development of Eimeria tenella in quail embryos. Journal of Tropical Medicine and Hygiene 20(1), 21.Google Scholar
Ryley, J. F. & Betts, D. (1973). Chemotherapy of chicken coccidiosis. Advances in Pharmacology and Chemotherapy 11, 221–93.CrossRefGoogle ScholarPubMed
Shirley, M. W. (1975). Enzyme variation in Eimeria species of the chicken. Parasitology 71, 369–76.CrossRefGoogle ScholarPubMed
Yvoré, P. & Aycardi, J. (1967). Une nouvelle coccidie Eimeria grenieri n.sp. (Protozoa: Eimeriidae) parasite de la pintade Numida meleagris. Comptes Rendus des Seances l'Academie de Science, Paris 264, 7376.Google Scholar