Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-08T07:31:14.745Z Has data issue: false hasContentIssue false
  • English
  • Français

Penetration and migration routes of Schistosoma japonicum miracidia in the snail Oncomelania hupensis

Published online by Cambridge University Press:  06 April 2009

M. Y. Xia  and
J. Jourdane
M. Y. Xia
Affiliation:
Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, 207 Rui Jin Er Lu, Shanghai, China
J. Jourdane
Affiliation:
Laboratoire de Biologie Animale, UA CNRS 698, Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, Université, Avenue de Villeneuve, 66860 Perpignan Cedex, France
Get access Rights & Permissions [Opens in a new window]

Extract

The routes of penetration and the strategies of invasion of Schistosoma japonicum miracidia in the snail vector Oncomelania hupensis were observed in a histological study. In all species of the genus Schistosoma, it is usually assumed that the miracidia achieve penetration through the tegument. Our results showed that at least 57% of S. japonicum miracidia penetrated the snail by natural openings (branchial cavity, mouth and rectum). Throughout the invasion phase, the larvae were observed in all the tissues and organs with the exception of the genital gland. The spatial distribution of parasites in the snail revealed that the migration towards the visceral organs such as the kidney, heart and sinuses (which are the most usual microhabitats of the mother sporocysts of S. japonicum) appeared to take place via the circulatory system. Using natural openings as routes for penetration probably provides a selective advantage in a host–parasite system in which the target mollusc is amphibious: we presume that the miracidia inside these natural openings are protected against desiccation when the snail leaves the water, and that they can subsequently invade the tissues.

Keywords

Schistosoma japonicumOncomelania hupensismiracidiumpenetrationmigration
Type
Research Article
Information
Parasitology , Volume 103 , Issue 1 , August 1991 , pp. 77 - 83
Copyright
Copyright © Cambridge University Press 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Capron, A., Deblock, S., Biguet, J., Clay, A., Adenis, L. & Vernes, A. (1965). Contribution à l'étude expérimentale de la bilharziose à Schistosoma haematobium. Bulletin of the World Health Organization 32, 755–78.Google Scholar
Faust, E. C. & Meleney, H. E. (1924). Studies on Schistosomiasis japonica. American Journal of Hygiene, Monograph Series 3, 1–339.Google Scholar
Kechemir, N. & Theron, A. (1980). Existence of replicating sporocysts in the development cycle of Schistosoma haematobium. Journal of Parasitology 66, 1068–70.Google Scholar
Jourdane, J. (1983). Mise en évidence d'un processus original de la reproduction asexuée chez Schistosoma haematobium. Comptes Rendus de l'Académie des Sciences, Paris, 296, 419–24.Google Scholar
Jourdane, J. & Theron, A. (1987). Larval development: eggs to cercariae. In The Biology of Schistosomes: From Genes to Latrines (ed. Rollinson, D. & Simpson, A. J. G.), pp. 83–113. London: Academic Press.Google Scholar
Jourdane, J., Theron, A. & Combes, C. (1980). Demonstration of several sporocysts generations as a text-abstract pattern of reproduction of Schistosoma mansoni. Acta Tropica 37, 177–82.Google Scholar
Jourdane, J. & Xia, M. Y. (1987). The primary sporocyst stages in the life cycle of Schistosoma japonicum. (Trematoda: Digenea). Transactions of the American Microscopic Society 106, 364–72.CrossRefGoogle Scholar
Liang, Y. S. & Van Der Schalie, M. (1975). Cultivating Lithoglyphopsis aperta Temcharoen, a new snail host for Schistosoma japonicum, Mekong strain. Journal of Parasitology 61, 915–19.CrossRefGoogle ScholarPubMed
Loker, E. S. (1978). Text-Abstract development of Schistosomatium douthitti in the snail Lymnaea catascopium. Journal of Parasitology 64, 977–85.Google Scholar
Martoja, R. & Martoja, M. (1967). Initiation aux Techniques de L'histologie Animale. Paris: Masson et Cei.Google Scholar
Pan, C. T. (1965). Studies on the host–parasite relationship between Schistosoma mansoni and the snail Australorbis glabratus. American Journal of Tropical Medicine and Hygiene 14, 931–76.Google Scholar
Theron, A. & Touassem, R. (1989). Schistosoma rodhaini: intramolluscan larval development, migration and replication processes of daughter sporocysts. Acta Tropica 46, 39–45.CrossRefGoogle ScholarPubMed
Touassem, R. & Theron, A. (1986). Study of the intramolluscal development of Schistosoma bovis: demonstration of three patterns of sporocystogenesis by daughter sporocysts. Parasitology 92, 337–41.CrossRefGoogle ScholarPubMed
Xia, M. Y. & Jourdane, J. (1991). Mise en évidence d'une réplication des sporocystes fils dans le développement naturel de Schistosoma japonicum. Comptes Rendus de l'Académie des Sciences, Paris 312, 209–13.Google Scholar