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Ultrastructural changes in the macrogamete and early oocyst of Eimeria maxima resulting from drug treatment

Published online by Cambridge University Press:  08 November 2011

R. M. Pittilo
Affiliation:
Department of Biology, North East London Polytechnic, Romford Road, London E15 1LZ
S. J. Ball
Affiliation:
Department of Biology, North East London Polytechnic, Romford Road, London E15 1LZ
L. P. Joyner
Affiliation:
Central Veterinary Laboratory, MAFF, New Haw, Weybridge, Surrey
C. C. Norton
Affiliation:
Central Veterinary Laboratory, MAFF, New Haw, Weybridge, Surrey

Summary

The ultrastructure of the macrogamete and developing oocyst of Eimeria maxima (Weybridge strain) was examined in the intestinal cells of chicks fed 3 different anticoccidial drugs. Amprolium at 125 p.p.m., arprinocid at 35 p.p.m. and dinitolmide at 250 p.p.m. caused considerable morphological abnormality and incomplete development of the wall-forming bodies of Type 2 (WFB II), which did not appear able to participate in oocyst wall formation. The wall-forming bodies of Type 1 (WFB I) were able in each case to participate in oocyst wall formation although amprolium and dinitolmide produced morphological abnormalities in them. In birds medicated with dinitolmide, the outer layer of the oocyst wall was formed initially at opposite poles of the macrogame tes rather than as a uniform layer. Other abnormalities resulting from drug treatment are reported and some evidence that intravacuolar tubules may be formed by the parasite pellicle is presented.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1981

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References

Hammond, D. M., Scholtyseck, E. & Chobotar, B. (1967). Fine structures associated with nutrition of the intracellular parasite Eimeria auburnensis. Journal of Parasitology 14, 678–83.Google ScholarPubMed
Joyner, L. P. & Norton, C. C. (1977). The anticoccidial effects of amprolium, dinitolmide and monensin against Eimeria maxima, E. brunetti and E. acervulina with particular reference to oocyst sporulation. Parasitology 75, 155–64.CrossRefGoogle Scholar
Pittilo, R. M. & Ball, S. J. (1979). The fine structure of the developing macrogamete of E. maxima. Parasitology 79, 259–65.CrossRefGoogle Scholar
Pittilo, R. M. & Ball, S. J. (1980). The ultrastructural development of the oocyst wall of Eimeria maxima. Parasitology 81, 115–22.CrossRefGoogle ScholarPubMed
Ruff, M. D., Anderson, W. I. & Reid, W. M. (1978). Effect of the anticoccidial arprinocid on production, sporulation, and infectivity of Eimeria oocysts. Journal of Parasitology 64, 306–11.CrossRefGoogle ScholarPubMed
Scholtyseck, E. (1973). Ultrastructure. In The Coccidia (ed. Hammond, D. M. and Long, P. L.), pp. 81144. Baltimore: University Park Press.Google ScholarPubMed

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