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Effects of Some Physico-chemical Factors on the Infection of Biomphalaria glabrata (Say) by Miracidia of Schistosoma mansoni Sambon in St. Lucia, West Indies*

Published online by Cambridge University Press:  05 June 2009

Edward Suchart Upatham
Edward Suchart Upatham*
Affiliation:
Research and Control Department, P.O. Box 93, Castries, St. Lucia, West Indies
*
† Staff member, The Rockefeller Foundation
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Extract

1. The four physico-chemical characteristics of water tested— volume, salinity, pH, and turbidity—were each found to affect infection of B. glabrata by S. mansoni miracidia.

2. The rate of infection decreased as the water volume increased from 90·6% at 0·005 litre to 47·5% at 50 litres.

3. The rate of infection decreased as sodium chloride concentration increased, from 78·7% at 0·5 ppm to 2·1% at 4200 ppm. Above 4200 ppm no infection occurred. The activity of the miracidia was affected above 1200 ppm. The snails became non-motile at above 4800 ppm and died within 10 hours at higher concentrations.

Type
Research Article
Information
Journal of Helminthology , Volume 46 , Issue 4 , December 1972 , pp. 307 - 315
Copyright
Copyright © Cambridge University Press 1972

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Footnotes

*

Part of a thesis submitted to the University of Michigan in partial fulfilment of the requirements for the degree of Doctor of Philosophy in the School of Natural Resources

References

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