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The immunity arising from continuous low-level infection with Eimeria tenella

Published online by Cambridge University Press:  06 April 2009

L. P. Joyner  and
C. C. Norton
L. P. Joyner
Affiliation:
Central Veterinary Laboratory, M.A.F.F., Weybridge, Surrey
C. C. Norton
Affiliation:
Central Veterinary Laboratory, M.A.F.F., Weybridge, Surrey
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Extract

Daily infection with doses of approximately five oocysts of Eimeria tenella produced an infection with an extended patency which ceased by the time the birds had received about 140 oocysts. Total oocyst production was comparable with that in birds given the same number of oocysts in a single dose, but the immunity to subsequent heavy challenge was significantly greater. Continuous exposure to low-level infections may be more comparable to the field situation and the present results suggest how birds can acquire a strong immunity without showing evidence of clinical disease.

Type
Research Article
Information
Parasitology , Volume 67 , Issue 3 , December 1973 , pp. 333 - 340
Copyright
Copyright © Cambridge University Press 1973

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References

REFERENCES

Hodgson, J. N. (1970). Coccidiosis. Oocyst counting technique for coccidiostat evaluation. Experimental Parasitology 28, 99–102.CrossRefGoogle ScholarPubMed
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