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Histochemical observations on the tegumentary epithelium and interproglottidal glands of Moniezia expansa (Rud., 1805) (Cestoda, Cyclophyllidea)

Published online by Cambridge University Press:  06 April 2009

R. E. Howells  and
D. A. Erasmus
R. E. Howells
Affiliation:
Department of Zoology, University College, Cardiff
D. A. Erasmus
Affiliation:
Department of Zoology, University College, Cardiff
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Extract

Regional differences in the tegumentary tissue of Moniezia expansa, as revealed at the light-microscope level by histological and histochemical techniques, are described and evidence for secretory activity by the interproglottidal glands is presented.

In very immature proglottides the interproglottidal glands are at the ‘precryptic’ stage. Gland cells may be differentiated from other tegumentary cells by their high RNA content and in certain gland cells the presence of an alcian blue staining material.

In mature proglottides the glands consist of rosette-like clusters of cells around crypt-like intuckings of the tegument. Two types of cells are found in the gland, small alcian blue-staining cells which are most numerous in the neck region of the crypt, and larger cells, the predominant gland cells, which do not stain with alcian blue but possess non-specific esterase activity. No other tegumentary cells in Moniezia exhibit this activity. Esterase and phosphatase activity is found in the tegument and crypt of the glands and in the interproglottidal folds.

The non-enzyme histochemistry confirms and extends the observations of previous workers.

Cytochrome oxidase and succinic dehydrogenase were detected in the tegumentary cells and tegument. Very strong reactions were given in the neck and scolex, with a progressive diminution of activity posteriorly along the strobila. Very low activities were recorded in the tegument of the glands.

Type
Research Article
Information
Parasitology , Volume 59 , Issue 3 , August 1969 , pp. 505 - 518
Copyright
Copyright © Cambridge University Press 1969

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