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Schistosoma mansoni: the development of the cercarial tegument

Published online by Cambridge University Press:  06 April 2009

David J. Hockley
David J. Hockley
Affiliation:
National Institute for Medical Research, London NW7 1AA
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Extract

Young cercariae were covered with a thin nucleated primitive epithelium which was lost when the true tegument appeared beneath it. The tegument was at first similar to the primitive epithelium in that it was a nucleated, cytoplasmic syncytium but it could be distinguished from the primitive epithelium by its thickened outer membrane and by the layer of interstitial material beneath its basal membrane. The tegumental nuclei became pycnotic and disappeared and, at about the same time, nucleated subtegumental cells became continuous with the tegument. Two types of small, dense bodies were formed in the subtegumental cells and passed into the tegument. Later in development the tegument became filled with dense, granular material and spines were formed. The fully developed cercarial tegument was covered with a surface coat of fibrous material which was specifically attached to the outer membrane of the tegument.

The observations described in this paper formed part of a thesis approved by the University of London for the Degree of Ph.D.

Type
Research Article
Information
Parasitology , Volume 64 , Issue 2 , April 1972 , pp. 245 - 252
Copyright
Copyright © Cambridge University Press 1972

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References

REFERENCES

Bennett, G. (1970). Migration of glycoprotein from Golgi apparatus to cell coat in the columnar cells of duodenal epithelium. Journal of Cell Biology 45, 668–73.CrossRefGoogle ScholarPubMed
Bennett, H. S. (1963). Morphological aspects of extracellular polysaccharides. Journal of Histochemistry and Cytochemistry 11, 13–23.CrossRefGoogle Scholar
Berlin, J. D. (1967). The localization of acid mucopolysaccharides in the Golgi complex of intestinal goblet cells. Journal of Cell Biology 32, 760–66.CrossRefGoogle ScholarPubMed
Bils, R. F. & Martin, W. E. (1966). Fine structure and development of the trematode integument. Transactions of the American Microscopical Society 85, 78–88.CrossRefGoogle ScholarPubMed
Dixon, K. E. & Mercer, E. H. (1967). The formation of the cyst wall of the metacercaria of Fasciola hepatica L. Zeitschrift für Zellforschung 77, 345–60.CrossRefGoogle ScholarPubMed
Dubois, G. (1929). Les cercaires de la région de Neuchâtel. Bulletin de la Société Neuchâteloise de Géographie 53, 1–177.Google Scholar
Dusanic, D. G. (1959). Histochemical observations of alkaline phosphatase in Schistosoma mansoni. Journal of Infectious Diseases 105, 1–8.CrossRefGoogle ScholarPubMed
Farbman, A. I. (1966). Plasma membrane changes during keratinization. Anatomical Record 156, 269–81.CrossRefGoogle Scholar
Gordon, R. M., Davey, T. H. & Peaston, H. (1934). The transmission of human bilharziasis in Sierra Leone, with an account of the life-cycle of the schistosomes concerned, S. mansoni and S. haematobium. Annals of Tropical Medicine and Parasitology 28, 323–418.CrossRefGoogle Scholar
Harris, H. & Watkins, J. F. (1965). Hybrid cells derived from mouse and man: artificial heterokaryons of mammalian cells from different species. Nature, London 205, 640–46.CrossRefGoogle ScholarPubMed
Hyman, L. H. (1951). The Invertebrates: Platyhelminthes and Rhynchocoela. The Acoelomate Bilateria. New York: McGraw-Hill.Google Scholar
Ito, S. (1965). The enteric surface coat on cat intestinal microvilli. Journal of Cell Biology 27, 475–91.CrossRefGoogle ScholarPubMed
Ito, S. (1969). Structure and function of the glycocalyx. Federation Proceedings 28, 12–25.Google ScholarPubMed
James, B. L. & Bowers, E. A. (1967). Reproduction in the daughter sporocysts of Cercaria bucephalopsis haimeana (Lacaze-Duthiers, 1854) (Bucephalidae) and Cercaria dichotoma Lebour, 1911 (non Muller) (Gymnophallidae). Parasitology 57, 607–25.CrossRefGoogle ScholarPubMed
James, B. L., Bowers, E. A. & Richards, J. G. (1966). The ultrastructure of the daughter sporocyst of Cercaria bucephalopsis haimeana Lacaze-Duthiers, 1854, from the edible cockle, Cardium edule L. Parasitology 56, 753–62.CrossRefGoogle ScholarPubMed
Kent, P. W. (1967). Structure and function of glycoproteins. In Essays in Biochemistry, vol. 3 (eds. Campbell, P. N. and Greville, G. D.), pp. 105–51. London and New York: Academic Press.Google Scholar
Kruidenier, F. J. (1953 a). Studies on the formation and function of mucoid glands in cercariae: Opisthorcoid cercariae. Journal of Parasitology 39, 385–91.CrossRefGoogle ScholarPubMed
Kruidenier, F. J. (1953 b). Studies on mucoid secretion and function in the cercaria of Paragonimus kellicotti Ward (Trematoda: Troglotrematidae). Journal of Morphology 92, 531–43.CrossRefGoogle Scholar
Kruidenier, F. J. & Stirewalt, M. A. (1955). The structure and source of the pericercarial envelope (CHR) of Schistosoma mansoni. Journal of Parasitology 41, 22.Google Scholar
Lentz, T. L. (1967). Rhabdite formation in planaria: the role of microtubules. Journal of Ultrastructure Research 17, 114–26.CrossRefGoogle ScholarPubMed
Lewis, W. H. (1927). The formation of giant cells in tissue cultures and their similarity to tuberculosis lesions. American Review of Tuberculosis 15, 616–28.Google Scholar
Morris, G. P. (1971). The fine structure of the tegument and associated structures of the cercaria of Schistosoma mansoni. Zeitschrift für Parasitenkunde 36, 15–31.CrossRefGoogle ScholarPubMed
Morris, G. P. & Threadgold, L. T. (1968). Ultrastructure of the tegument of adult Schistosoma mansoni. Journal of Parasitology 54, 15–27.CrossRefGoogle ScholarPubMed
Neutra, M. & Leblond, C. P. (1966). Synthesis of the carbohydrate of mucus in the Golgi complex as shown by electron microscope radioautography of goblet cells from rats injected with glucose-H3. Journal of Cell Biology 30, 119–36.CrossRefGoogle ScholarPubMed
Skaer, R. J. (1965). The origin and continuous replacement of epidermal cells in the planarian Polycelis tenuis (Iijima). Journal of Embryology and Experimental Morphology 13, 129–39.Google ScholarPubMed
Smith, J. H., Reynolds, E. S. & Lichtenberg, F. von (1969). The integument of Schistosoma mansoni. The American Journal of Tropical Medicine and Hygiene 18, 28–49.CrossRefGoogle ScholarPubMed
Southgate, V. R. (1967). Observations on the cyst formation of Notocotylus attenuatus. Parasitology 57, 6P.Google ScholarPubMed
Stirewalt, M. A. (1963). Cercaria vs. schistosomule (Schistosoma mansoni): absence of the pericercarial envelope in vivo and the early physiological and histological metamorphosis of the parasite. Experimental Parasitology 13, 395–406.CrossRefGoogle ScholarPubMed
Warthin, A. S. (1931). Occurrence of numerous large giant cells in tonsils and pharyngeal mucosa in prodromal stages of measles; report of four cases. Archives of Pathology 11, 864–74.Google Scholar