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Scanning and transmission electron microscopy of Eimeria maxima microgametogenesis

Published online by Cambridge University Press:  06 April 2009

S. J. Ball
Affiliation:
Department of Biology, North East London Polytechnic, Romford Road, London E15 4LZ
R. M. Pittilo
Affiliation:
Department of Biology, North East London Polytechnic, Romford Road, London E15 4LZ
L. P. Joyner
Affiliation:
Central Veterinary Laboratory, M.A.F.F., New Haw, Weybridge, Surrey
C. C. Norton
Affiliation:
Central Veterinary Laboratory, M.A.F.F., New Haw, Weybridge, Surrey

Summary

The structure and development of microgametocytes of Eimeria maxima from chicks killed during the 6th day of infection were examined using transmission and scanning electron microscopy. Initially, nucleoli disappear and the surface of the microgametocyte invaginates. This is followed by a condensation of the chromatin which then lies at the periphery of the nuclei. Concurrent with this, the flagella are formed and they project into the parasitophorous vacuole and internal invaginations. Eventually, the nuclei become more dense and are seen to protrude from the periphery of the gametocyte. The surface view of mature microgametocytes consists of a large number of closely packed flagella.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1981

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References

REFERENCES

Cheissin, E. M. (1965). Electron microscopic study of microgametogenesis in two species of coccidia from rabbit (Eimeria magna and E. intestinalis). Acta Protozoologica 3, 215–24.Google Scholar
Ferguson, D. J. P., Birch-Andersen, A., Hutchison, W. M. & Siim, J. Chr. (1977 a). Ultrastructural studies on the endogenous development of Eimeria brunetti II. Microgametogony and the microgamete. Acta pathologica et microbiologica Scandinavica B 85, 6777.Google Scholar
Ferguson, D. J. P., Birch-Andersen, A., Hutchison, W. M. & Siim, J Chr. (1977 b). Cytochemical electron microscopy on polysaccharide granules in the endogenous forms of Eimeria brunetti. Acta pathologica et microbiologica Scandinavica B 85, 241–8.Google Scholar
Ferguson, D. J. P., Hutchison, W. M., Dunachie, J. F. & Siim, J. Chr. (1974). Ultra- structural study of early stages of asexual multiplication and microgametogony of Toxoplasma gondii in the small intestine of the cat. Acta pathologica et microbiologica Scandinavica B 82, 167–81.Google Scholar
Fernando, M. A. (1973). Fine structural changes associated with microgametogenesis of Eimeria acervulina in chickens. Zeitschrift für Parasitenkunde 43, 3342.CrossRefGoogle ScholarPubMed
Madden, P. A. & Vetterling, J. M. (1977). Scanning electron microscopy of Eimeria tenella microgametogenesis and fertilization. Journal of Parasitology 63, 607–10.Google Scholar
Mehlhorn, H. (1972 a). Elektronenmikroskopische Untersuchungen an Entwicklungsstadien von Eimeria maxima (Sporozoa, Coccidia). II. Die Feinstruktur der Mikrogameten. Zeitschrift für Parasitenkunde 40, 151–63.Google Scholar
Mehlhorn, H. (1972 b). Elektronenmikroskopische Untersuchungen an Entwicklungsstadien von Eimeria maxima ans dem Haushuhn. III. Des Differenzierungsprozess der Mikrogameten unter besonderer Besuchsichtigung der Kernteilungen. Zeitschrift für Parasitenkunde 40, 243–60.CrossRefGoogle Scholar
Pittlo, R. M. & Ball, S. J. (1979). The fine structure of the developing macrogamete of Eimeria maxima. Parasitology 79, 259–65.CrossRefGoogle Scholar
Scholtyseck, E. (1965). Die Mikrogametenentwicklung von Eimeria perforans. Zeitschrift für Zellforschung 66, 625–42.Google Scholar
Scholtyseck, E., Mehlhorn, H. & Hammond, D. M. (1972). Electron microscope studies of microgametogenesis in coccidia and, related groups. Zeitschrift für Parasitenkunde 38, 95131.CrossRefGoogle ScholarPubMed
Speer, C. A. & Danforth, H. D. (1976). Fine structural aspects of microgametogenesis of Eimeria magna in rabbits and in kidney cell structures. Journal of Protozoology 23, 109–15.Google Scholar