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Stimulation of the activity of Schistosoma mansoni miracidia by snail–conditioned water

Published online by Cambridge University Press:  06 April 2009

P. R. Mason
P. R. Mason
Affiliation:
The Tropical Pathology Research Unit, The South African Institute for Medical Research, P. O. Box 1038, Johannesburg 2000, Republice of South Africa
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Summary

A dark-ground photographic technique was used to analyse the reactions of Schistosoma mansoni miracidia to homogeneous solutions of snail–conditioned water (SCW). The most significant effect of this water was to increase miracidial turning. This effect was maintained under both acid and alkaline conditions, after passage of the SCW through a mixed bed resin and after chelation of either calcium or both calcium and magnesium ions. The stimulant in the water was unaffected by trypsin but was protease–sensitive, suggesting its possible identity as a peptide. The importance of ‘active spaces’ rather than concentration gradients in miracidial host–location was emphasized.

Type
Research Article
Information
Parasitology , Volume 75 , Issue 3 , December 1977 , pp. 325 - 338
Copyright
Copyright © Cambridge University Press 1977

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References

REFERENCES

Bossert, W. H. & Wilson, E. O. (1963). The analysis of olfactory communications among animals. Journal of Theoretical Biology 5, 433–54.CrossRefGoogle ScholarPubMed
Chernin, E. (1970). Behavioural responses of miracidia of Schistosoma mansoni and other trematodes to substances emitted by snails. Journal of Parasitology 56, 287–96.CrossRefGoogle ScholarPubMed
Coulson, J. M. & Richardson, J. F. (1959). Chemical Engineering. London: Pergamon Press.Google Scholar
Kassim, O. & Gilbertson, D. E. (1976). Hatching of Schistosoma mansoni eggs and observations on motility of miracidia. Journal of Parasitology 62, 715–20.CrossRefGoogle ScholarPubMed
Kinoti, G. (1968). Observations of the infection of bulinid snails with Schistosoma matthei. I. The susceptibility of Bulinus truncatus and Bulinus africanus. Annals of Tropical Medicine and Parasitology 62, 382–92.Google Scholar
Kloetzel, K. (1960). Novas observaêoes sobre o tropisomo do miracidio de Schistosoma–mansoni pelo moluscc Australorbis glabratus. Revista do Institute de Medicina Tropical de Säo Paulo 2, 341–6.Google Scholar
Larue, G. R. (1951). Host–parasite relationships among the digenetic trematodes. Journal of Parasitolgyo 37, 333–42.CrossRefGoogle ScholarPubMed
Lowry, O. H., Rosebrough, N. J., Farr, A. L. & Randall, R. J. (1951). Protein measurement with the Folin phenol reagent. Journal of Biological Chemistry 193, 265–75.CrossRefGoogle ScholarPubMed
Macinnis, A. J. (1965). Responses of Schistosoma mansoni miracidia to chemical attractants. Journal of Parasitology 58, 731–46.Google Scholar
Macinnis, A. J., Bethel, W. M. & Cornford, E. M. (1974). Identification of chemicals of snail origin that attract Schistosoma mansoni miracidia. Nature, London 248, 361–3.CrossRefGoogle ScholarPubMed
Mason, P. R. & Fripp, P. J. (1976). Analysis of the movements of Schistosoma mansoni miracidia using dark-ground photography. Journal of Parasitology 62, 721–9.CrossRefGoogle ScholarPubMed
Mason, P. R. & Fripp, P. J. (1977). Chemical stimulation of Schistosoma mansoni miracidial activity. Zeitschrift für Parasitenkunde (in the Press).Google Scholar
Patlack, O. S. (1953). A mathematical contribution to the study of the orientation of animals. Bulletin of Mathematical Biophysics 152, 431–76.Google Scholar
Prechel, D. P., Cain, G. D. & Nollen, P. M. (1976). Responses of Megalodiscus temperatus miracidia to amino acids and sialic acids found in snail conditioned water. Journal of Parasitology 62, 693–7.CrossRefGoogle ScholarPubMed
Satir, P. (1974). How cilia move. Scientific American 231, 44–52.Google ScholarPubMed
Shiff, C. J. & Kriel, R. L. (1970). A water soluble product of Bulinus (Physopsis) globosus attractive to Schistosoma haematobium miracidia. Journal of Parasitology 56, 28 1–6.Google Scholar
Sponholtz, G. M. & Short, R. B. (1976). Schistosoma mansoni miracidia: stimulation by calcium and magnesium. Journal of Parasitology 62, 155–7.CrossRefGoogle ScholarPubMed
Stibbs, H., Chernin, E., Ward, S. & Karnovsky, M. L. (1976). Magnesium emitted by snails alters swimming behaviour of Schistosoma mansoni miracidia. Nature, London 260, 702–3.CrossRefGoogle ScholarPubMed
Thomas, J. D. (1973). Schistosomiasis and the control of molluscan hosts of human schistosomiasis with particular reference to possible self–regulatory mechanisms. Advances in Parasitology 11, 307–94.CrossRefGoogle ScholarPubMed
Ullyott, P. (1936). The behaviour of Dendrocoelum lacteum. II. Responses in non–directional gradients. Journal of Experimental Biology 13, 265–78.CrossRefGoogle Scholar
Ulmer, M. J. (1971). Site finding behaviour in helminths in intermediate and definitive hosts. In Ecology and Physiology of Parasites, (ed. Fallis, A. M.), Toronto: University of Toronto Press.Google Scholar
Upatham, E. S. (1973). Location of Biomphalaria glabrata (Say) by miracidia of Schistosoma mansoni Sambon in natural standing and running waters on the West Indian island of St Lucia. International Journal for Parasitology 3, 289–97.CrossRefGoogle ScholarPubMed
Webbe, G. (1966). The effect of water velocities on the infection of Biomphalaria sudanica tanganyicensis exposed to different numbers of Schistosoma mansoni miracidia. Annals of Tropical Medicine and Parasitology 60, 85–9.CrossRefGoogle ScholarPubMed
Wilson, E. O. (1970). Chemical communication within animal species. In Chemical Ecology, (ed. Sandheimer, E.). New York: Academic Press.Google Scholar
Wilson, R. A. & Denison, J. (1970). Studies on the activity of the miracidium of the common liver fluke, Fasciola hepatica. Comparative Biochemistry and Physiology 32, 301–13.CrossRefGoogle ScholarPubMed
Wright, C. A. (1959). Host location by trematode miracidia. Annals of Tropical Medicine and Parasitology 53, 288–92.CrossRefGoogle ScholarPubMed
Wright, C. A. (1966). Miracidial responses to molluscan stimuli. Proceedings of the 1st International Congress of Parasitology. 2. 1058–1959.Google Scholar