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Studies on the relationship between Eimeria acervulina and Eimeria mivati

Published online by Cambridge University Press:  06 April 2009

P. L. Long
P. L. Long
Affiliation:
Houghton Poultry Research Station, Houghton, Huntingdonshire
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Extract

Two strains each of Eimeria acervulina and Eimeria mivati were examined for their ability to develop in the chorioallantoic membrane (CAM) of chicken embryos and the caeca of chickens. It was found that between 100 and 1000 times more sporozoites of E. acervulina were needed to produce infections in the caeca and the embryo CAM respectively. The reproduction of both species in infections of chickens was similar and a high degree of cross-protection occurred.

It was found that oocysts of E. mivati differed in size and shape depending upon whether they were produced from infections of embryos or chickens. When maintained by passage in chickens they assumed size and shape characteristics of E. acervulina.

These findings, with the known similarity of the life-cycle stages, pathogenicity and pathology, indicate that E. mivati is not sufficiently different from E. acervulina to be a distinct species. It is suggested that it is best referred to as E. acervulina var. mivati.

Type
Research Article
Information
Parasitology , Volume 67 , Issue 2 , October 1973 , pp. 143 - 155
Copyright
Copyright © Cambridge University Press 1973

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References

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