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The structure and composition of the capsule of Trichinella spiralis in host muscle

Published online by Cambridge University Press:  06 April 2009

R. G. Bruce
R. G. Bruce
Affiliation:
Molteno Institute, University of Cambridge*
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Summary

The results of ultrastructural studies and histochemical tests on the capsule of Trichinella spiralis are given. The capsule wall is shown to consist of two layers, an outer region of tightly compacted fibrils and an inner region of fibrils dispersed through matrix cytoplasm. Histochemical tests show the capsule wall to consist mainly of collagen and cystine. The appearance of the matrix, which is packed with mitochondria, rough endoplasmic reticulum, smooth reticulum and Golgi complexes, together with the histochemical reaction to the five enzymes tested, strongly suggests that the matrix is a region of high metabolic activity. Although there are several very large nuclei in the matrix there is no evidence of cell walls; consequently the matrix is a syncytium.

I wish to thank the A.R.C. for financial support while this work was carried out. I should also like to thank Dr D. L. Lee for his advice on many occasions and the late Professor Boyd of the Anatomy Department, University of Cambridge, for the use of the electron microscope in that Department.

Type
Research Article
Information
Parasitology , Volume 60 , Issue 2 , April 1970 , pp. 223 - 227
Copyright
Copyright © Cambridge University Press 1970

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References

Beckett, E. B. & Boothroyd, B. (1962). The histochemistry and electron microscopy of glycogen in the larva of Trichinella spiralis and its environment. Annals of Tropical Medicine and Parasitology 56, 266–73.CrossRefGoogle Scholar
Bruce, R. G. (1966). The fine structure of the intestine and hind-gut of the larva of Trichinella spiralis. Parasitology 56, 359–65.CrossRefGoogle ScholarPubMed
Bullock, W. L. (1953). Phosphatases in experimental Trichinella spiralis infections in the rat. Experimental Parasitology 2, 150–62.CrossRefGoogle Scholar
Denham, D. A. (1965). Studies with methyridine and Trichinella spiralis. 1. Effect upon the intestinal phase in mice. Experimental Parasitology 17, 10–14.CrossRefGoogle ScholarPubMed
Gould, S. E. (1945). Trichinosis. Springfield, Illinois: Charles C. Thomas.CrossRefGoogle ScholarPubMed
Kramer, H. & Little, K. (1953). In Nature and Structure of Collagen. London: Butterworth.Google Scholar
Pearse, A. G. E. (1960). Histochemistry, Theoretical and Applied. London: J. & A. Churchill.Google Scholar
Ritterson, A. L. (1966). Nature of the cyst of Trichinella spiralis. Journal of Parasitology 52, 157–61.CrossRefGoogle ScholarPubMed
Virchow, R. (1860). Ueber Trichina spiralis. Virchows Archiv für pathologische Anatomie und Physiologie und für klinische Medizin 18, 330–46.Google Scholar
Virchow, R. (1864). Darstellung der Lehre von den Trichinen. Berlin: George Reimer.CrossRefGoogle Scholar
Zarzycki, J. (1963). Histochemical studies on capsules of Trichinellae. Wiadomości para-zytologiczne 9, 453–8.Google ScholarPubMed