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The structure and function of the adhesive organ in strigeid trematodes

Part III. Apatemon gracilis minor Yamaguti, 1933

Published online by Cambridge University Press:  06 April 2009

Christina Öhman
Christina Öhman
Affiliation:
Department of Zoology, University College, Cardiff, G.B*.
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Extract

The biology and life cycle of Apatemon gracilis minor is briefly described.

The morphology of the cup–shaped forebody with the small lappets, the pear-shaped subcuticular cells and the very flexible finger–like adhesive organ lobes is considered in some detail.

An extensive description of the body musculature is given and the mode of attachment of the parasite to the host mucosa is studied.

The main results of the histochemical tests are: (a) a relative absence of enzymes in the adhesive organ and a greater activity in the lappets; (b) the presence of two types of esterase, a non-specific esterase of B-type in the caecal cells and a non-specific esterase of resistant type, possibly a non-specific cholinesterase, in the rest of the reacting sites in the parasite; (c) a relatively small activity for leucine aminopeptidase; (d) the presence of RNA at all sites of enzyme formation; and finally, (e), the presence of enzymes and carbohydrates in the cuticle.

The activities of the parasite result in a local disruption of the host intestinal mucosa at the site of attachment. It is suggested that this is a result of the activities of the enzymes secreted by the parasite.

The absorption of nutrients and the circulatory function of the excretory system are discussed.

I should like to express my sincere thanks to Dr D. A. Erasmus for helpful discussions and advice during the progress of the work and to Professor J. Brough for giving me the opportunity to work in his department. The study was conducted during the tenure of a grant from Svenska Vetenskapliga Centralrådet i Finland.

Type
Research Article
Information
Parasitology , Volume 56 , Issue 2 , May 1966 , pp. 209 - 226
Copyright
Copyright © Cambridge University Press 1966

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References

REFERENCES

Crompton, D. W. T. (1963). Morphological and histochemical observations on Polymorphus minutus (Goeze, 1782), with special reference to the body wall. Parasitology, 53, 663–87.CrossRefGoogle Scholar
Dubois, G. (1944). A propos de la spécificité parasitaire des Strigeida. Bull. Soc. neuchâtel Sci. nat. 69, 5–103.Google Scholar
Dusanic, D. G. (1959). Histochemical observations of alkaline phosphatase in Schistosoma mansoni. J. infect. Dis. 105, 1–8.CrossRefGoogle ScholarPubMed
Erasmus, D. A. (1957 a). Studies on phosphatase systems of cestodes. I. Studies on Taenia pisiformis (Cysticercus and adults). Parasitology, 47, 70–80.CrossRefGoogle Scholar
Erasmus, D. A. (1957 b). Studies on phosphatase systems of cestodes. II. Studies on Cysticercus tenuicollis and Monezia expansa. Parasitology, 47, 81–91.CrossRefGoogle Scholar
Erasmus, D. A. & Öhman, C. (1963). The structure and function of the adhesive organ in strigeid trematodes. Ann. N.Y. Acad. Sci. 113, 7–35.CrossRefGoogle ScholarPubMed
Glenner, G. G., Burnstone, M. S. & Meyer, D. B. (1959). A study of aminopeptidase activity in the stroma of neoplastic tissue, with a comparison of histochemical techniques. J. natn. Cancer. Inst. 23, 857–73.Google ScholarPubMed
Henderson, A. E. (1962). Studies on the morphology, development and life-cycles of some strigeid trematodes. Ph.D. thesis, University of Wales.Google Scholar
Hess, R. & Pearse, A. G. E. (1958). The histochemistry of indoxyl esterase of rat kidney, with special reference to its cathepsin-like activity. Br. J. exp. Path. 39, 292–9.Google Scholar
Iles, C. (1960). The larval trematodes of certain fresh-water molluscs. II. Experimental studies on the life-cycle of two species of furcocercariae. Parasitology, 50, 401–18.CrossRefGoogle ScholarPubMed
Kilejian, A., Schinazi, L. A. & Schwabe, C. W. (1961). Host–parasite relationships in echinococcosis. V. Histochemical observations on Echinococcus granulosus. J. Parasit. 47, 181–8.CrossRefGoogle Scholar
Komiya, Y. (1938). Die Entwicklung des Exkretionssystems einiger Trematoden Larven aus Alster un Elbe nebst Bemerkungen über ihren Entwicklungszyklus. Z. ParasitKde 10, 340–85.CrossRefGoogle Scholar
Mehra, H. R. (1950). Evolution of the blood flukes and strigeid trematodes. Pres. address, 19th Annual Meeting Nat. Acad. Sci. India.Google Scholar
Monné, L. (1959). On the external cuticles of various helminths and their role in the host–parasite relationship. A histochemical study. Ark. Zool. 12, 343–58.Google Scholar
Öhman, C. (1965). The structure and function of the adhesive organ in strigeid trematodes. Part II. Diplostomum spathaceum Braun, 1893. Parasitology, 55, 481–502.CrossRefGoogle Scholar
Pearse, A. G. E. (1960). Histochemistry, Theoretical and Applied, 2nd ed. 998 pp. London: J. and A. Churchill Ltd.Google Scholar
Pepler, W. J. & Pearse, A. G. E. (1957). The histochemistry of the esterases of rat brain, with special reference to those of the hypothalamic nuclei. J. Neurochem. 1, 193–202.CrossRefGoogle ScholarPubMed
Robinson, D. L. H. (1961). Phosphatase in Schistosoma mansoni. Nature, Lond., 191, 473–4.CrossRefGoogle ScholarPubMed
Rogers, W. P. (1947). Histological distribution of alkaline phosphatase in helminth parasites. Nature, Lond., 159, 374.CrossRefGoogle ScholarPubMed
Smith, E. L. (1950). Proteolytic enzymes. In The Enzymes, vol. 1, part 2, pp. 793–872. Ed. Summers, J. B. and Myrbäck, M.. New York: Academic Press.Google Scholar
Szidat, L. (1929). Beiträge zur Kenntnis der Gattung Strigeida I. Z. ParasitKde. 1, 612–74.CrossRefGoogle Scholar
Van Duijn, P. (1961). Acrolein-Schiff, a new staining method for proteins. J. Histochem. Cytochem. 9, 234–41.CrossRefGoogle ScholarPubMed
Van Haitsma, J. P. (1931). Studies on the trematode family Strigeidae (Holostomidae). No. XXII. Cotylurus flabelliformis (Faust) and its life–history. Pap. Mich. Acad. Sci. 13, 447–82.Google Scholar
Yamaguti, S. (1933). Studies on the helminth fauna of Japan. Part I. Trematodes of birds, reptiles and mammals. Jap. J. Zool. 5, 1–134.Google Scholar