Hostname: page-component-8448b6f56d-gtxcr Total loading time: 0 Render date: 2024-04-24T03:03:17.092Z Has data issue: false hasContentIssue false
  • English
  • Français

Eimeria mitis in mixed infections with E. acervulina and E. brunetti in the fowl

Published online by Cambridge University Press:  06 April 2009

L. P. Joyner  and
C. C. Norton
L. P. Joyner
Affiliation:
MAFF, Central Veterinary Laboratory, Weybridge, Surrey
C. C. Norton
Affiliation:
MAFF, Central Veterinary Laboratory, Weybridge, Surrey
Get access Rights & Permissions [Opens in a new window]

Summary

Eimeria mitis and E. acervulina affect different areas of the intestine. Young chicks received E. mitis with or without E. acervulina in doses ranging from 2 to 128 × 104 oocysts. Mixed infections produced significantly more severe effects on growth than single infections of either species. The ratio of villus height to total mucosal thickness was reduced throughout the intestine in birds which received the mixed infection. E. mitis and E. brunetti affect the same area of the intestine. Single infections of E. brunetti in a range of doses from 1.25 to 20 × 103 oocysts produced a similar reduction in growth. When 20 × 103 oocysts of E. mitis were inoculated simultaneously, the effect on growth was not so severe and the oocyst output of both species was reduced. E. brunetti, superimposed 1, 2 or 3 days after an E. mitis infection, produced no greater effect on growth than E. mitis alone. Similarly, infections of E. mitis, superimposed on E. brunetti had no greater effect on growth than the latter species alone. Oocyst output of E. brunetti in superimposed infections was not reduced but peak output was delayed.

Type
Research Article
Information
Parasitology , Volume 86 , Issue 3 , June 1983 , pp. 381 - 390
Copyright
Copyright © Cambridge University Press 1983

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Catchpole, J., Norton, C. C. & Joyner, L. P. (1976). Experiments with defined multispecific coccidial infections in lambs. Parasitology 72, 137–47.Google Scholar
Duszynski, D. W. (1972). Host and parasite interactions during single and concurrent infections with Eimeria nieschulzi and E. separata in the rat. Journal of Protozoology 19, 82–8.CrossRefGoogle Scholar
Hein, H. E. (1968). The pathogenic effects of Eimeria acervulina in young chicks. Experimental Parasitology 22, 1–11.CrossRefGoogle ScholarPubMed
Hein, H. E. (1974). Eimeria brunetti: pathogenic effects in young chickens. Experimental Parasitology 36, 333–41.CrossRefGoogle ScholarPubMed
Hein, H. E. (1976). Eimeria acervulina, E. brunetti and E. maxima: pathogenic effects of single or mixed infections with low doses of oocysts in chickens. Experimental Parasitology 39, 415–21.CrossRefGoogle ScholarPubMed
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
Norton, C. C. & Joyner, L. P. (1980). Studies with Eimeria acervulina and E. mivati: pathogenicity and cross-immunity. Parasitology 81, 315–23.Google Scholar
Norton, C. C. & Joyner, L. P. (1981). Eimeria acervulina and E. mivati: oocysts, life-cycle and ability to develop in the chicken embryo. Parasitology 83, 269–79.CrossRefGoogle Scholar
Pout, D. D., Hebert, C. N. & Payne, R. (1971). The possible use of simple biometrics of fowl intestine. Research in Veterinary Science 12, 101–5.CrossRefGoogle ScholarPubMed
Rose, M. E. (1975). Infections with Eimeria maxima and Eimeria acervulina in the fowl: effect of previous infection with the heterologous organism on oocyst production. Parasitology 70, 263–71.CrossRefGoogle ScholarPubMed
Ryley, J. F. & Betts, M. J. (1973). Chemotherapy of chicken coccidiosis. Advances in Pharmacology and Chemotherapy 11, 221–93.CrossRefGoogle ScholarPubMed
Williams, R. B. (1973). The effect of Eimeria acervulina on the reproductive potentials of four other species of chicken coccidia during concurrent infections. British Veterinary Journal 129, xxix–xxxi.CrossRefGoogle ScholarPubMed