Summary
This study considers the earlier growth stages of Coccidium Coelotropha durchoni in its host, Nereis diversicolor. Before evolving into free trophozoites and gamontes in coeliac fluid, the parasites remain in muscular and coeliac cells in microscopic intracellular form. Electron microscope reveals that these stages show an intermediary fine structure between that of a sporozoite — from which they keep some typical characteristics such as the conoid, the fibers and the involuted tubuli — and that of the future free trophozoites. The wall consisting in two clear membrans is provided with one or several micropores. The classical cytoplasmic organites clearly stand out: dictyosomes show constant relationship with ergastoplasm, the mitochondria contain short inner tubuli. Besides the paraglycogen granules and lipoid vacuoles, at least three types of vacuoles may be observed. Peculiar topographic relationship connects mitochondria and paraglycogen granules probably in formation. In the nucleus with classical membrane and heterogeneous structure, a rather voluminous nucleolus may be seen.
Similar content being viewed by others
Bibliographie
Aikawa, M., P. K. Hepler, C. G. Huff, and H. Sprinz: The feeding mechanism of avian malarial parasites. J. Cell Biol. 28, 355–373 (1966).
Bardele, C. F.: Elektronenmikroskopische Untersuchungen an dem Sporozoon Eucoccidium dinophili Grell. Z. Zellforsch. 74, 559–595 (1966).
Challey, J. R., and Wm. C. Burns: The invasion of the caecal mucosa by Eimeria tenella sporozoïtes and their transport by macrophages. J. Protozool. 6, 238–241 (1959).
Cheissin, E. M., and E. S. Snijirevskaya: Some new data on the fine structure of the merozoïtes of Eimeria intestinalis (Sporozoa, Eimeriidae). Protistologica 1, 121–126 (1965).
Dehorne, A.: Sur l'Aggregata de Nereis diversicolor et sur l'infestation normale de l'épiderme annélidien par les sporozoïtes. C.R. Soc. Biol. (Paris) 103, 665–668 (1930).
Doran, D. J.: The migration of Eimeria acervulina sporozoïtes to the duodenal glands of Lieberkühn. J. Protozool. 13, 27–33 (1966).
Garnham, P. C. C., J. R. Baker, and R. G. Bird: Electron microscope studies of motile stages of malaria parasites. IV. The fine structure of the sporozoïtes of four species of Plasmodium. Trans. roy. Soc. trop. Med. Hyg. 57, 27–31 (1963).
Hennere, E.: Stades évolutifs de deux Coccidies parasites d'Annélides Polychètes: Myriosporides amphiglenae, gen. n., sp. n., parasite de Amphiglena mediterranea Claparède (Sabellidae). Defretinella eulaliae gen. n., sp. n., parasite de Eulalia viridis Müller (Phyllodocidae). C.R. Acad. Sci. Paris 262, 890–893 (1966).
—: Etude cytologique des premiers stades du développement d'une Coccidie: Myriosporides amphiglenae. J. Protozool. 14, 27–39 (1967).
Ludvik, J.: Electron microscopic study of some parasitic Protozoa. Proc. first Intern. Protozool. in Prague 1961, p. 386–393 (1963).
Porchet-Hennere, E.: Corrélations entre le cycle du développement de la Coccidie Myriosporides amphiglenae et celui de son hôte Amphiglena mediterranea (Annélide Polychète). Mode de contamination. Protistologica (1967) (sous presse).
Scholtyseck, E. O., u. U. G. Piekarsky: Elektronenmikroskopische Untersuchungen an Merozoiten von Eimerien (Eimeria perforans und E. stiedae) und Toxoplasma gondii. Zur systematischen Stellung von T. gondii. Z. Parasitenk. 26, 91–115 (1965).
Vivier, E.: Une nouvelle Coccidie Eucoccidium durchoni, n. sp., parasite de l'Annélide Polychète Nereis diversicolor O.F.M. ler Congr. Intern. Protozool., Prague 1961. In: Progress in protozool. Prague: Publ. House Czech. Acad. Sci. 1963.
—, et E. Hennere: Cytologie, cycle et affinités de la Coccidie Coelotropha durchoni, nomen novum (= Eucoccidium durchoni Vivier), parasite de Nereis diversicolor O. F. Müller (Annélide Polychète). Bull. biol. Françe et Belg. 98, 1, 153–206 (1964).
—: Ultrastructure des stades végétatifs de la Coccidie Coelotropha durchoni. Protistologica 1, 89–104 (1965).
- - et J. Schrevel: Etude de quelques caractères ultrastructuraux communs à diverses Grégarines et Coccidies. Progress in Protozoology, II. Intern. Conf. on Protozool., London 1965.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Porchet-Hennere, E. Etude des premiers stades de développement de la Coccidie Coelotropha durchoni . Z. Zellforsch. 80, 556–569 (1967). https://doi.org/10.1007/BF00330722
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00330722