Ultrastructural development of first- to second-generation merozoites in Eimeria contorta Haberkorn, 1971.

Zeitschrift Für Parasitenkunde
B E Müller

Abstract

The development of first-generation merozoites to second-generation schizonts and merozoites of Eimeria contorta in one of its natural hosts, the mouse, was investigated with the electron microscope. Merozoites inside a host cell show a marked U-shape and a degeneration of the inner-pellicular membrane complex prior to transformation into schizonts. These processes closely resemble those seen in transforming sporozoites. In young schizonts with about 3-5 nuclei, the Golgi-adjuncts (structures of unknown function) form a large interconnected network. Nuclear divisions in growing schizonts involve the formation of a centrocône, which develops in a pocket-like indentation of the nuclear envelope. At least one centriole is present immediately adjacent to this indentation. In a later stage, the centrocône forms a conical nuclear protrusion directed towards a merozoite-anlage. This developing merozoite contains anlagen of a conoid, of rhoptries, and of micronemes and a refractile body in addition to the nucleus, centrioles, and a Golgi-adjunct. The merozoite-anlage is limited by a triple unit membrane complex. Schizonts give rise to 8-15 second-generation merozoites. Interesting features of these merozoites are the high number of mi...Continue Reading

References

Jan 1, 1970·Zeitschrift Für Parasitenkunde·E Scholtyseck
Jan 1, 1974·Zeitschrift Für Parasitenkunde·M A Fernando, O Remmler
Jan 1, 1971·Zeitschrift Für Parasitenkunde·C A Speer, D M Hammond
Jan 1, 1971·Zeitschrift Für Parasitenkunde·A Haberkorn
Feb 1, 1970·The Journal of protozoology·W L Roberts, D M Hammond
May 1, 1968·The Journal of protozoology·F C Colley
May 1, 1967·The Journal of protozoology·F C Colley

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Citations

Jan 3, 2001·The Journal of Cell Biology·B StriepenD S Roos
Sep 14, 2006·Molecular Microbiology·Shipra Vaishnava, Boris Striepen
Dec 1, 1976·Acta Pathologica Et Microbiologica Scandinavica. Section B, Microbiology·D J FergusonJ C Siim

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