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Influence of cadmium exposure on the incidence of first intermediate host encystment by Echinoparyphium recurvatum cercariae in Lymnaea peregra

Published online by Cambridge University Press:  12 April 2024

N.J. Morley ,
M. Crane  and
J.W. Lewis
N.J. Morley*
Affiliation:
School of Biological Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK
M. Crane
Affiliation:
School of Biological Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK
J.W. Lewis
Affiliation:
School of Biological Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK
*
*Fax: +44 (0) 1784 434326 E-mail: [email protected]
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Abstract

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The effect of cadmium exposure of the snail first intermediate host Lymnaea peregra on the incidence of encystment of Echinoparyphium recurvatum (Digenea: Echinostomatidae) cercariae without emergence from the snail was investigated. Exposure to 100 μg l−1 Cd for 72 h caused a significant increase in the incidence of first host encystment when compared to controls. In addition, autometallographic staining of E. recurvatum daughter rediae and developing cercariae showed that there was metal accumulation within their body tissues. The significance of these findings to parasite transmission in metal-polluted environments is discussed.

Type
Review Article
Information
Journal of Helminthology , Volume 78 , Issue 4 , December 2004 , pp. 329 - 332
Copyright
Copyright © Cambridge University Press 2004

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