Ultrastructure of the Miracidium of Echinostoma paraensei Lie and Basch, 1967 (Trematoda, Echinostomatidae) |
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| Authors: | Jairo Pinheiro Arnaldo Maldonado Jr M. Attias Reinalda Marisa Lanfredi |
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| Affiliation: | (1) Departamento de Ciências Fisiológicas, Instituto de Biologia, Universidade Federal Rural do Rio de Janeiro, km7, BR465, 23.890-000 Seropédica, RJ, Brazil;(2) Laboratório de Biologia de Helmintos Otto Wucherer, Instituto de Biofísica Carlos Chagas Filho, CCS, Bloco G, Universidade Federal do Rio de Janeiro, Ilha do Fundão, 21.949-900 Rio de Janeiro, RJ, Brazil;(3) Laboratório de Biologia e Controle da Equistossomose, Departamento de Medicina Tropical, Instituto Oswaldo Cruz. Av. Brazil, 4365, 21.045-900 Rio de Janeiro, RJ, Brazil;(4) Laboratório de Ultraestrutura Hertha Meyer, Instituto de Biofísica Carlos Chagas Filho, CCS, Bloco G, Universidade Federal do Rio de Janeiro, Ilha do Fundão, 21.949-900 Rio de Janeiro, RJ, Brazil |
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| Abstract: | The morphology of Echinostoma paraensei was studied using transmission electron microscopy. The terebratorium region has many electrondense secretory granules and many folds on the surface. The epidermal cells that cover the larval body have unique nuclear morphology, many mitochondria and vesicles being attached to the interepidermal ridges by a septate junction. The cilia present the organization 9+2 and a typical structure with a shaft, axosome, basal body and rootlet. Below the epidermal cells there is a layer of circular muscle and, adjacent to it, a layer of longitudinal muscle fibers. The excretory system has two flame cells, with internal and external ribs and leptotriches at the barrel region, an excretory vesicle and an excretory pore. |
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| Keywords: | Echinostoma paraensei Miracidium Ultrastructrure |
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