Schistocephalus solidus and Ligula intestinalis: Pinocytosis by the tegument |
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Authors: | LT Threadgold CA Hopkins |
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Institution: | Zoology Department, The Queen''s University of Belfast, Northern Ireland;Wellcome Laboratories for Experimental Parasitotogy, University of Glasgow, Glasgow, Scotland, U.K. |
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Abstract: | Using ruthenium red as a macromolecule, endocytosis was demonstrated in the plerocercoid of Ligula intestinalis and adult Schistocephalus solidus. Uptake, transport across the tegument, and exocytosis across the basal plasma membrane occurred within 6 min. The types of vesicles in the tegument of L. intestinalis are redescribed and their former classification is modified. The vertical and longitudinal distribution of pinosomes in the tegument of adult S. solidus and L. intestinalis plerocercoids were determined. The possible role of macromolecular uptake in the economy of pseudophyllidean tapeworms is discussed with particular reference to growth and defence of an unencysted larval stage in the tissues of the intermediate host. |
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Keywords: | Cestodes adult plerocercoid Ultrastructure Tegument Endocytosis Ruthenium red Pinocytosis function in metabolism and immunity Snails |
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