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Fine structure of the first and second generation merozoites ofEimeria necatrix

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Summary

The fine structure of the first- and second-generation merozoites ofEimeria necatrix was studied in experimentally infected chickens. The outer membrane and inner membrane complex were separated by a space of approximately 0.019 μm. The anterior polar ring (0.49 μm), the posterior pore (0.33 μm), subpellicular microtubules (22 in number), conoid (0.34 μm) and anterior annuli were similar to those found in most eimerian merozoites. In the region of the conoid, the subpellicular microtubules were in spaces formed by the fluted inner membrane. A fine osmiophilic “canopy” was seen over the anterior end of the merozoite. The rhoptries, numerous micronemes, 1 to 5 electron-dense refractile bodies, large elongate mitochondria, and polysaccharide granules were found anterior to the nucleus. Cisternae of rough endoplasmic reticulum, 1 or 2 elongate mitochondria and polysaccharide granules were seen posterior to the nucleus.

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References

  • Andreassen, J., Behnke, O.: Fine structure of merozoites of a rat coccidianEimeria miyairii, with a comparison of the fine structure of other sporozoa. J. Parasit.54, 150–163 (1968)

    Article  PubMed  CAS  Google Scholar 

  • Colley, F. C.: Fine structure of schizonts and merozoites ofEimeria nieschulzi. J. Protozool.15, 374–382 (1968)

    PubMed  CAS  Google Scholar 

  • Dubremetz, J. F.: L'ultrastructure du centriole et du centrocône chez la coccidieEimeria necatrix. Étude au cours de la schizogonie. J. Microscopie12, 453–458 (1971)

    Google Scholar 

  • Dubremetz, J. F.: Étude ultrastructurale de la mitose schizogonique chez la coccidieEimeria necatrix (Johnson 1930). J. Ultrastruct. Res.42, 354–376 (1973)

    PubMed  CAS  Google Scholar 

  • Fernando, M. A.: Fine structure of the schizonts and merozoites ofEimeria acervulina in the chicken. J. Parasit. in press (1973a)

  • Fernando, M. A., Stockdale, P. H. G.: Fine structural changes associated with schizogony inEimeria necatrix. Z. Parasitenk.43, 105–114 (1973b)

    Article  Google Scholar 

  • Lee, D. L., Millard B. J.: Fine structure of the schizonts ofEimeria praecox. Int. J. Parasit.1, 37–41 (1971)

    Article  CAS  Google Scholar 

  • McLaren, D. J., Paget, G. E.: A fine structural study on the merozoites ofEimeria tenella with special reference to the conoid apparatus. Parasitology58, 561–571 (1968)

    Article  PubMed  CAS  Google Scholar 

  • Mehlhorn, H., Sénaud, J., Scholtyseek, E.: Sur l'ultrastructure des organites liés à la division nucléaire chez les CoccidiesEimeria falciformis (Eimer 1870) etEimeria maxima (Tyzzer 1929), au cours de la schizogonie et de la microgamétogènese. C. R. Acad. Sci. (Paris)275 (D), 835–837 (1972)

    Google Scholar 

  • Pellérdy, L., Haberkorn, A., Mehlhorn, H., Scholtyseck, E.: Die Feinstruktur der Schizonten und Merozoiten des MäusecoccidsEimeria falciformis. Acta vet. Acad. Sci. hung.21, 433–443 (1971)

    PubMed  Google Scholar 

  • Roberts, W. L., Hammond, D. M., Anderson, L. C., Speer, C. A.: Ultrastructural study of schizogony inEimeria callospermophili. J. Protozool.17, 584–592 (1970)

    PubMed  CAS  Google Scholar 

  • Scholtyseck, E., Mehlhorn, H., Friedhoff, K.: The fine structure of the conoid of sporozoa and related organisms. Z. Parasitenk.34, 68–94 (1970)

    Article  Google Scholar 

  • Sénaud, J., Černa, Z.: Étude Ultrastructurale des Mérozoites et de la schizogonie des coccidies (Eimeriima):Eimeria magna (Perard 1925) de l'intestin des lapins etE. tenella (Railliet et Lucet, 1891) des coecums des poulets. J. Protozool.16, 155–165 (1969)

    PubMed  Google Scholar 

  • Sheffield, H. G., Hammond, D. M.: Fine structure of first-generation merozoites ofEimeria bovis. J. Parasit.52, 595–606 (1966)

    Article  PubMed  CAS  Google Scholar 

  • Sheffield, H. G., Melton, M. L.: The fine structure and reproduction ofToxoplasma gondii. J. Parasit.54, 209–226 (1968)

    Article  PubMed  CAS  Google Scholar 

  • Vetterling, J. M., Pacheco, N. D., Madden, P. A.: Ultrastructure of dormant, activated, and intracellular sporozoites ofEimeria adenoeides andE. tenella. J. Parasit.59, 15–27 (1973)

    Article  PubMed  CAS  Google Scholar 

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Authors and Affiliations

  1. Department of Pathology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada

    M. A. Fernando &  O. Remmler

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  1. M. A. Fernando
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  2. O. Remmler
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Supported in part by the Ontario Ministry of Agriculture and Food.

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Fernando, M.A., Remmler, O. Fine structure of the first and second generation merozoites ofEimeria necatrix . Z. F. Parasitenkunde 44, 133–137 (1974). https://doi.org/10.1007/BF02433465

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  • DOI: https://doi.org/10.1007/BF02433465

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