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Immunity to Eimeria brunetti and Eimeria maxima infections in the fowl

Published online by Cambridge University Press:  06 April 2009

M. Elaine Rose
M. Elaine Rose
Affiliation:
Houghton Poultry Research Station, Houghton, Huntingdon
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Extract

Fowls were completely resistant to a third inoculation with E. maxima oocysts given after two graded and spaced infections. Resistance was complete to a fourth inoculation of E. brunetti oocysts after a series of three infections.

Birds made resistant to E. maxima and then inoculated with E. brunetti showed very little evidence of this infection when the intestines were examined on the sixth day and they passed very few oocysts in the faeces. The resistance of E. brunetti-immunized chickens to E. maxima infection was not quite so strong. The results indicate that, under the conditions of the experiment, infection with either of these species will protect in some degree against subsequent infection with the other. These results suggest that the species specificity of acquired resistance is not so complete as previously reported.

I am indebted to my colleague, Mr P. L. Long, for his interest throughout the experiment and, in particular, for assistance with the examination of the intestines. The excellent technical assistance of other members of the Parasitology Department is also gratefully acknowledged. Mr Paul Rogers took the photographs.

Type
Research Article
Information
Parasitology , Volume 57 , Issue 2 , May 1967 , pp. 363 - 370
Copyright
Copyright © Cambridge University Press 1967

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References

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