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The hatching of Hymenolepis diminuta eggs and penetration of the hexacanths in Tenebrio molitor beetles

Published online by Cambridge University Press:  06 April 2009

R. C. Lethbridge
R. C. Lethbridge
Affiliation:
Department of Zoology, Imperial College, London, S. W. 7
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Extract

The hatching of Hymenolepis diminuta eggs and penetration of the emergent hexacanths in adult and larval Tenebrio molitor beetles had been described. Hatching was shown to be a two-stage process involving rupture of the eggshell by the insect's mandibles and digestion of the remaining egg-layers in the midgut lumen. Penetration of hatched embryos was examined by histological methods that demonstrated the rate of migration and the route taken by hexacanths entering the haemocoel of adult beetles. Differences in the arrangement of the midgut tissues in adult and larval T. molitor were detected and shown to account for the failure of hexacanths to complete migration in the larvae. The role of the embryonic hooks and penetration gland secretions during hatching and penetration has also been discussed.

I should like to thank Professor T. R. E. Southwood for providing generous research facilities, Dr June Mahon for her advice and encouragement, and in particular, Dr W. Mordue for his continuous interest and many useful criticisms. This work was conducted during the tenure of a Science Research Council Studentship at Imperial College of Science and Technology, London, S.W. 7.

Type
Research Article
Information
Parasitology , Volume 62 , Issue 3 , June 1971 , pp. 445 - 456
Copyright
Copyright © Cambridge University Press 1971

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References

REFERENCES

Berntzen, A. K. & Voge, M. (1965). In-vitro hatching of oncospheres of four Hymenolepidid cestodes. Journal of Parasitology 51, 235–42.CrossRefGoogle ScholarPubMed
Llewellyn, J. (1965). The evolution of parasitic platyhelminths. Symposia of the British Society for Parasitology 3, 47–78.Google Scholar
Ogren, R. E. (1961). The mature oncosphere of Hymenolepis diminuta. Journal of Parasitology 47, 197–204.CrossRefGoogle ScholarPubMed
Pantin, C. F. A. (1962). Notes on Microscopical Technique for Zoologists. Cambridge: Cambridge University Press.Google Scholar
Pearse, A. G. E. (1961). Histochemistry, Theoretical and Applied, 2nd ed.London: J. and A. Churchill, Ltd.Google Scholar
Reid, W. M. (1948). Penetration glands in Cyclophyllidean cestodes. Transactions of the American Microscopical Society 67, 177–82.CrossRefGoogle Scholar
Rockstein, M. (ed.) (1965). The Physiology of Insecta, Vol. 2. New York and London: Academic Press, Inc.Google Scholar
Rybicka, K. (1966). Embryogenesis in Hymenolepis diminuta, I. Morphogenesis. Experimental Parasitology 19, 366–79.CrossRefGoogle ScholarPubMed
Sawada, I. (1961). Penetration glands in the oncospheres of Raillietina cesticillus. Experimental Parasitology 11, 141–6.CrossRefGoogle Scholar
Schiller, E. L. (1959). Experimental studies on morphological variation in the cestode genus Hymenolepis. I. Morphology and development of the cysticercoid of H. nana in Tribolium confusum. Experimental Parasitology 8, 91–118.CrossRefGoogle ScholarPubMed
Silverman, P. H. (1954). Studies on the biology of some tapeworms of the genus Taenia. I: Factors affecting hatching and activation of taeniid ova, and some criteria of their viability. Annals of Tropical Medicine and Parasitology 48, 207–15.CrossRefGoogle Scholar
Silverman, P. H. & Maneely, R. B. (1955). Studies on the biology of some tapeworms of the genus Taenia. III. The role of the secreting gland of the hexacanth embryo in the penetration of the intestinal mucosa of the intermediate host, and some of its histochemical reactions. Annals of Tropical Medicine and Parasitology 49, 326–30.CrossRefGoogle ScholarPubMed
Smyth, J. D. & Clegg, J. A. (1959). Egg-shell formation in trematodes and cestodes. Experimental Parasitology 8, 286–323.CrossRefGoogle ScholarPubMed
Stirewalt, M. A. (1963). Chemical biology of secretions of larval helminths. Annals of the New York Academy of Science 113, 36–53.CrossRefGoogle ScholarPubMed
Taylor, A. E. R. & Baker, R. J. (1968). The Cultivation of Parasites In-Vitro. Oxford and Edinburgh: Blackwell Scientific Publications.Google Scholar
Voge, M. & Berntzen, A. K. (1961). In-vitro hatching of oncospheres of Hymenolepis diminuta (Cestoda: Cyclophyllidea). Journal of Parasitology 47, 813–18.CrossRefGoogle ScholarPubMed
Voge, M. & Graiwer, M. (1964). Development of oncospheres of Hymenolepis diminuta, hatched in-vivo and in-vitro, in the larvae of Tenebrio molitor. Journal of Parasitology 50, 267–70.CrossRefGoogle ScholarPubMed