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Ultrastructural observations on the redial tegument of Paramphistomum epiclitum from the planorbid snail, Indoplanorbis exustus

Published online by Cambridge University Press:  05 June 2009

T. S. Dunn ,
P. H. Dang ,
G. Mattison ,
R. E. B. Hanna  and
W. A. Nizami
T. S. Dunn*
Affiliation:
Zoology Department, University of Oklahoma, 730 Van Vleet Oval, Norman, Oklahoma 73019, USA
P. H. Dang
Affiliation:
Zoology Department, University of Oklahoma, 730 Van Vleet Oval, Norman, Oklahoma 73019, USA
G. Mattison
Affiliation:
School of Biological Sciences, The Queen's University of Belfast, Belfast, Northern Ireland, UK
R. E. B. Hanna
Affiliation:
School of Biological Sciences, The Queen's University of Belfast, Belfast, Northern Ireland, UK
W. A. Nizami
Affiliation:
Zoology Department, Aligarh Muslim University, Aligarh 202 001, India
*
*T. S. Dunn, Dept. Pathology, BMSB Rm 434, P. O. Box 26901, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73190, USA.
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Abstract

The morphology of the tegument in the redia of Paramphistomum epiclitum (Digenea: Paramphistomidae) resembles that shown by most larval and adult digeneans; an outer surface syncytium is in continuity with the cytoplasm of in-sunken, nucleated cytons. Although tegumental cytons usually contain a single nucleus, some display up to six nuclei. The tegumental syncytium lining the pharynx of P. epiclitum rediae lack underlying cytons. The apical membrane of the tegument is elaborated by folds and microvilli, which presumably facilitate uptake of nutrients and/or exchange of ions involved in osmoregulation. A single type of secretory body, resulting from the fusion of smaller vesicles produced at Golgi complexes in the cytons, occurs throughout the tegument. Uniciliate sensory receptors occur in the surface syncytium particularly around the oral opening.

Keywords

Paramphistomum epiclitumrediategumentultrastructureTrematoda
Type
Research Article
Information
Journal of Helminthology , Volume 66 , Issue 3 , September 1992 , pp. 167 - 176
Copyright
Copyright © Cambridge University Press 1992

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References

REFERENCES

Al-Salman, H. A. & James, B. L. (1989) Ultrastructural studies on the daughter sporocysts of Meiogymnophallus minutus (Digenea: Gymnophallidae). International Journal for Parasitology, 19, 499–508.CrossRefGoogle Scholar
Bogitsh, B. J. (1968) Cytochemical and ultrastructural observations on the tegument of the trematode Megalodiscus temperatus. Transactions of the American Microscopical Society, 87, 477–486.CrossRefGoogle ScholarPubMed
Cheng, T. C. & YEE, H. W. F. (1968) Histochemical demonstration of amino peptidase activity associated with the intramolluscan stages of Philophthalmus gralli Mathias & Leger. Parasitology, 58, 473–480.CrossRefGoogle Scholar
Dunn, T. S. (1984) Epidemiological, histological and histochemical studies on paramphistome parasites (Trematoda: Digenea) of the Indian water buffalo, Bubalus bubalis. Ph. D. Thesis, The Queen's University of Belfast, Northern Ireland.Google Scholar
Dunn, T. S., Hanna, R. E. B. & Nizami, W. A. (1987a) Ultrastructural and cytochemical studies on the tegument of three species of paramphistomes (Platyhelminthes: Digenea) from the Indian water buffalo, Bubalus bubalis. International Journal for Parasitology, 17, 1153–1161.CrossRefGoogle Scholar
Dunn, T. S., Hanna, R. E. B. & Nizami, W. A. (1987b) Ultrastructural and histochemical observations on the epidermis, presumptive tegument and glands of the miracidium of Gigantocotyle explanatum (Trematoda: Paramphistomidae). International Journal for Parasitology, 17, 885–895.CrossRefGoogle Scholar
Dunn, T. S., Hanna, R. E. B. & Nizami, W. A. (1987b) Ultrastructural and histochemical observations on the foregut and gut caeca of Gigantocotyle explanatum, Gastrothylax crumenifer and Srivastavaia indica (Trematoda: Paramphistomidae). International Journal for Parasitology, 17, 1141–1152.CrossRefGoogle Scholar
Erasmus, D. A. (1972) The Biology of Trematodes. Edward Arnold: London.Google Scholar
Fried, B. & Haseeb, M. A. (1991) Platyhelminthes: Aspidogastrea, Monogenea, and Digenea. In: Microscopic Anatomy of Invertebrates, Vol 3, Platyhelminthes and Nemertinea (editors, Harrison, F. W. & Bogitsh, B. J.) pp. 141–209. Wiley-Liss, New York.Google Scholar
Halton, D. W. (1972) Ultrastructure of the alimentary tract of Aspidogaster conchicola (Trematoda: Aspidogastrea). Journal of Parasitology, 55, 455–467.CrossRefGoogle Scholar
Hanna, R. E. B. (1980) Fasciola hepatica: glycocalyx replacement in the juvenile as a possible mechanism for protection against host immunity. Experimental Parasitology, 50, 103–114.CrossRefGoogle ScholarPubMed
Hockley, D. J. & McLaren, D. J. (1973) Schistosoma mansoni: changes in the outer membrane of the tegument during development from the cercaria to adult worm. International Journal for Parasitology, 3, 13–25.CrossRefGoogle ScholarPubMed
Irwin, S. W. B., Threadgold, L. T. & Howard, N. H. (1978) Cryptocotyle lingua (Creplin) (Digenea: Heterophyidae): observations on the morphology of the redia. with special reference to the birth papilla and release of cercariae. Parasitology, 76, 193–199.CrossRefGoogle Scholar
Køie, M. (1971) On the histochemistry and ultrastructure of the redia of Neophasis lageniformis (Lebour, 1910) (Trematoda: Acanthocolopidae). Ophelia, 9, 113–143.CrossRefGoogle Scholar
Køie, M., Nansen, P. & Christensen, N. O. (1977) Stereoscan studies of rediae, cercariae, cysts, excysted metacercariae and migratory stages of Fasciola hepatica. Zeitschrift für Parasitenkunde, 54, 289–297.CrossRefGoogle ScholarPubMed
Krupa, P. L., Bal, A. K. & Cousineau, G. H. (1967) Ultrastructure of the redia of Cryptocotyle lingua. Journal of Parasitology, 53, 725–734.CrossRefGoogle ScholarPubMed
Krupa, P. L., Cousineau, G. H. & Bal, A. K. (1968) Ultrastructure and histochemical observations on the body wall of Cryplocotyle lingua rediae (Trematoda). Journal of Parasitology, 54, 900–908.CrossRefGoogle Scholar
Page, M. R., Nadakavukaren, M. J. & Huizinga, H. W. (1980) Ribeiroia marini: surface ultrastructure of redia, cercaria, and adult. International Journal for Parasitology, 10, 5–12.CrossRefGoogle Scholar
Reader, T. A. J. (1972) Ultrastructural and cytochemical observations on the body wall of the redia of Sphaeridiotrema globulus (Rudolphi 1819). Parasitology, 65, 537–546.CrossRefGoogle Scholar
Rees, G. F. (1980) Surface ultrastructure of the redia of Parorchis acanthus, Nicoll (Digenea: Philophthalmidae). Zeitschrift für Parasitenkunde, 63, 36–46.CrossRefGoogle Scholar
Rees, G. F. (1981) The ultrastructure of the epidermis of the redia of Parorchis acanthus, Nicoll (Digenea; Philophthalmidae). Zeitschrift für Parasitenkunde, 65, 19–30.CrossRefGoogle Scholar
Robbins, S. H., Hammett, M. & Fried, B. (1979) Light and transmission electron microscopical studies and amino acid analysis of the metacercarial cyst of Zygocotyle lunata (Trematoda). International Journal for Parasitology, 9, 257–260.CrossRefGoogle ScholarPubMed
Robinson, G. & Threadgold, L. T. (1975) Electron microscopic studies of Fasciola hepatica. XII. The fine structure of the gastrodermis. Experimental Parasitology, 37, 20–36.CrossRefGoogle ScholarPubMed
Smyth, J. D. & Halton, D. W. (1983) The Physiology of Trematodes. Cambridge University Press, Cambridge.Google Scholar
Southgate, V. R. (1969) Studies on the biology and host-parasite relationships of some larval Digenea. Ph.D. Thesis, University of Cambridge.Google Scholar
Thomas, J. S. & Pascoe, D. (1973) The digestion of exogenous carbohydrate by the daughter sporocyts of Cercaria linearis Lespes, 1857 and Cercaria stunkardi Palombi, 1936, in vitro. Zeitschrift für Parasitenkunde, 43, 17–23.CrossRefGoogle Scholar
Threadgold, L. T. (1984) Parasitic platyhelminths. In: Biology of the Integument, Volume I. Invertebrates. (editors. Bereiter-Hahn, J., Matoltsy, A. G. & Richards, K. S.) pp. 132–191. Springer-Verlag, Berlin.CrossRefGoogle Scholar
Threadgold, L. T. & Brennan, G. (1978) Fasciola hepatica: basal infolds and associated vacuoles of the tegument. Experimental Parasitology, 46, 300–316.CrossRefGoogle ScholarPubMed
Žďárská, Z., Našincová, V., & Valkounova, J. (1989) Multiciliate sensory endings in the redia of Echinostoma revolutum (Trematoda, Echinostomatidae). Folia Parasitologica, 35, 17–22.Google Scholar