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Sporogony in Glugea stephani, a Microsporidan of the Winter Flounder Pseudopleuronectes americanus


Sporogony in Glugea stephani, a Microsporidan of the Winter Flounder Pseudopleuronectes americanus



Journal of Protozoology 30(3): 3A



ISSN/ISBN: 0022-3921

The microsporidan Glugea stephani is a spore-forming intracellular obligate protozoan parasite which infects the intestinal connective tissue of flounder (Sprague 1976). Glugea, unlike most other microsporidan genera, interacts with the host cell to produce a cell hypertrophy tumor, xenoma (Weissenberg, 1913) which may exceed 3 mm in diameter. In the xenoma massive proliferation occurs producing thousands of organisms. Something triggers the conversion of these organisms into the sporogonic phase of development, This phase is characterized by: 1-separation of protozoan cells from direct contact with the host cytoplasm; 2-scalloped thickening of the parasite plasmalemma; 3-repeated karyokinesis; 4-multiple cytokinetic divisions (polysporogony) and increased plasmalemma density; 5-appearance of three types of appendages extending from the surface of these sporoblastic forms. This sporogonic phase occurs in sporogony vacuoles in which up to sixteen (16) sporoblasts have been observed in a single histological section through one of the vacuoles, thus demonstrating the polysporous nature of Glugea stephani.

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Accession: 038903517

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Related references

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