Ultrastructural study on the development of Goussia aculeati, a coccidium parasitizing the three-spined stickleback Gasterosteus aculeatus
- 1 January 1989
- journal article
- research article
- Published by Inter-Research Science Center in Diseases of Aquatic Organisms
- Vol. 6 (1) , 45-53
- https://doi.org/10.3354/dao006045
Abstract
Goussia aculeati developed in the parasitophorous vacuole situated intraplasmatically between nucleus and apical end of the intestinal epithlium cell of the three-spined stickleback Gasterosteus aculeatus (L.). A single membrane of the parasitophorous vacuole formed numerous intravacuolar blebs, which detached to be absorbed by the parasite micropores or invaginations on its surface. All developmental stages of the parasite, except merozoites, were surrounded by a single membrane. Meronts of one of the last generations were formed through ectomerogony. Few microgametes formed on the surface or in the deep fissures of the microgamont. In macrogamonts, 2 types of electron-dense membrane-bound bodies were seen: small ones, up to 600 nm in diameter, round and homogenous; and large ones of irregular electron-density, up to 1.9 .mu.m in diameter. Role and origin of these bodies in G. aculeati remain unknown.Keywords
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