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The activity of methyl benzoquate and clopidol against Eimeria maxima: synergy and drug resistance

Published online by Cambridge University Press:  06 April 2009

L. P. Joyner  and
C. C. Norton
L. P. Joyner
Affiliation:
Ministry of Agriculture, Fisheries and Food, Central Veterinary Laboratory, New Haw, Weybridge, Surrey, KT15 3NB
C. C. Norton
Affiliation:
Ministry of Agriculture, Fisheries and Food, Central Veterinary Laboratory, New Haw, Weybridge, Surrey, KT15 3NB
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Summary

Synergy between clopidol and methyl benzoquate against Eimeria maxima was shown to be supra-additive. Collateral sensitivity to these drugs could not be demonstrated in resistant lines of this parasite. Resistance to methyl benzoquate and clopidol was not transferred when lines of E. maxima, resistant to the respective drugs, were propagated together. The failure to demonstrate this phenomenon was judged not to be due to synergy between the drugs. Attempts to induce simultaneous resistance to both drugs failed, although resistance to methyl benzoquate was readily acquired by a line of E. maxima resistant to clopidol. Induced resistance to clopidol in a methyl benzoquate-resistant line required numerous passages.

Type
Research Article
Information
Parasitology , Volume 76 , Issue 3 , June 1978 , pp. 369 - 377
Copyright
Copyright © Cambridge University Press 1978

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References

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