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1 Acta Parasitologica

1 1995

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Transmission of horseradish peroxidase across the tegument of some hymenolepidid species [Cyclophyllidea]

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Walski M. , Cielecka D. , Chomicz L. , Grytner-Ziecina B.

Acta Parasitologica

1995

tom 40

nr 4

Strobilae of three hymenolepidid tapeworm species: Diorchis elisae, Fimbriaria fasciolaris and Sobolevicanthus gracilis, obtained from experimentally infected domestic ducks, were incubated for 5,10 and 15 min at a temperature of 38°C, with horseradish peroxidase applied as a tracer by which to research macromolecular transport across the tegument. Through the use of an electron microscope, it was indicated that the marked protein was bound at the surface of the microtriches with the co-participation of glycoproteins of the plasma membrane. It was also shown that the protein molecules gathered at the base of the microtriches were transported in vesicular form inside the syncytial layer and perikaryon part of the tegumental cytoplasm. Molecules of horseradish peroxidase liberated from the vesicles were observed in the excretory system of the tapeworms. In spite of interspecific differences in the structure of the tegument, the tracer protein transmission observed in this research was found to proceed in a similar manner in all the hymenolepidids studied.