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Eimeria maxima: a comparison of two laboratory strains with a fresh isolate

Published online by Cambridge University Press:  06 April 2009

C. C. Norton  and
Helen E. Hein
C. C. Norton
Affiliation:
Central Veterinary Laboratory, Weybridge, Surrey
Helen E. Hein
Affiliation:
Central Veterinary Laboratory, Weybridge, Surrey
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Summary

Oocysts of the Weybridge and Houghton strains of Eimeria maxima and a fresh field isolate were similar and measured on average 30·9 × 22·4 μm. The Weybridge strain and the field isolate produced similar pathogenic effects in 6-week-old chickens, high doses causing 50–80% mortality and severe weight loss. The Houghton strain was slightly less pathogenic and few birds died but more oocysts were produced. With each strain, a single dose gave complete immunity to a light challenge with the homologous strain. Two or 3 immunizing doses gave complete immunity to a heavy homologous challenge but were not sufficient to protect against heterologous challenge.

Type
Research Article
Information
Parasitology , Volume 72 , Issue 3 , June 1976 , pp. 345 - 354
Copyright
Copyright © Cambridge University Press 1976

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References

Doran, D. J., Vetterling, J. M., & Augustine, P. C., (1974). E. tenella: an in vivo and in vitro comparison of the Wisconsin, Weybridge and Beltsville strains. Proceedings of the Helminihological Society of Washington 41, 77–80.Google Scholar
Fernando, M. A., & Remmler, O., (1973). Four new species of Eimeria and one of Tyzzeria from the Ceylon jungle fowl Gallus lafayettei. Journal of Protozoology 20, 43–5.CrossRefGoogle ScholarPubMed
Hein, H. E., (1973). Observations on the level and duration of resistance to re-infection conferred by different numbers of infections and doses of oocysts of Eimeria maxima and Eimeria necatrix in young chickens. Proceedings of 4th European Poultry Conference4thLondon, 131–5.Google Scholar
Hein, H. E., (1976). The immunity to coccidiosis developed in young chickens following the administration of multiple low doses of oocysts of either Eimeria acervulina, Eimeria brunetti, Eimeria maxima or Eimeria necatrix. Experimental Parasitology (in the Press).CrossRefGoogle Scholar
Joyner, L. P., (1969). Immunological variation between two strains of Eimeria acervulina. Parasitology 59, 725–32.CrossRefGoogle ScholarPubMed
Joyner, L. P., & Norton, C. C., (1969). A comparison of two laboratory strains of Eimeria tenella. Parasitology 59, 907–13.CrossRefGoogle ScholarPubMed
Long, P. L., (1968). The effect of breed of chickens on resistance to Eimeria infections. British Poultry Science 9, 71–8.CrossRefGoogle ScholarPubMed
Long, P. L., (1970 a). Some factors affecting the severity of infection with Eimeria tenella in chicken embryos. Parasitology 60, 435–47.CrossRefGoogle ScholarPubMed
Long, P. L., (1970 b). Anticoccidial drugs. Factors affecting pathogenicity of avian coccidia. Experimental Parasitology 28, 4–10.CrossRefGoogle ScholarPubMed
Long, P. L., (1973). Studies on the relationship between Eimeria acervulina and Eimeria mivati. Parasitology 67, 143–55.CrossRefGoogle ScholarPubMed
Long, P. L., (1974 a). Experimental infection of chickens with two species of Eimeria isolated from the Malaysian jungle fowl. Parasitology 69, 337–47.CrossRefGoogle ScholarPubMed
Long, P. L., (1974 b). ‘Pathology and pathogenicity of coccidial infections’. In The Coccidia (ed. Hammond, D. M. and Long, P. L.), pp. 253–94. Baltimore: University Park Press.Google Scholar
Long, P. L., & Rowell, J. G., (1958). Counting oocysts of chicken coccidia. Laboratory Practice 7, 515–9.Google Scholar
Norton, C. C., & Joynee, L. P., (1975). The development of drug-resistant strains of Eimeria maxima in the laboratory. Parasitology 71, 153–65.CrossRefGoogle ScholarPubMed
Pellérdy, L. P., (1974). Coccidia and Coccidiosis, 2nd edn, 959 pp. Paul Parey: Berlin.Google Scholar
Ryley, J. F., & Betts, M. J., (1973). ‘Chemotherapy of Chicken Coccidiosis’. In Advances in Pharmacology and Chemotherapy, Vol. 11, pp. 221–93. New York: Academic Press.Google Scholar