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The oocyst sporulation time of Eimeria species from the fowl

Published online by Cambridge University Press:  06 April 2009

C. C. Norton  and
M. J. Chard
C. C. Norton
Affiliation:
Central Veterinary Laboratory, MAFF, New Haw, Weybridge, Surrey KT15 3NB and Unilever Research Laboratory, Colworth House, Sharnbrook, Beds MK44 1LQ
M. J. Chard
Affiliation:
Central Veterinary Laboratory, MAFF, New Haw, Weybridge, Surrey KT15 3NB and Unilever Research Laboratory, Colworth House, Sharnbrook, Beds MK44 1LQ
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Summary

Freshly isolated oocysts were sporulated at 29°C with constant aeration. Minimum sporulation time was determined by dosing the developing oocysts at intervals of 1 h to successive groups of chickens to assess the first occurrence of infective forms. Microscopic analysis of the sporulating oocysts allowed calculation of the time required for 50% of the oocysts to complete the process. This was considered to be the most accurate determination and the most useful for comparative purposes. For 7 species of coccidia in the fowl, the 50% sporulation times were as follows: Eimeria acervulina 11·4 h; E. brunetti 38·3 h; E. maxima 38·1 h; E. mivati 19·0 h; E. necatrix 19·7 h; E. praecox 24·8 h; E. tenella 21·2 h.

Type
Research Article
Information
Parasitology , Volume 86 , Issue 2 , April 1983 , pp. 193 - 198
Copyright
Copyright © Cambridge University Press 1983

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References

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