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Influence of intramolluscan larval stages of Echinostoma liei on the infectivity of Schistosoma mansoni cercariae

Published online by Cambridge University Press:  05 June 2009

J. Jourdane ,
J. B. Mounkassa  and
D. Imbert-Establet
J. Jourdane
Affiliation:
Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, (UA 698), Université de Perpignan, 66025 Perpignan Cedex, France
J. B. Mounkassa
Affiliation:
Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, (UA 698), Université de Perpignan, 66025 Perpignan Cedex, France
D. Imbert-Establet
Affiliation:
Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, (UA 698), Université de Perpignan, 66025 Perpignan Cedex, France
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Abstract

During co-infection of Biomphalaria glabrata with Schistosoma mansoni and Echinostoma liei, S. mansoni cercariae released before the complete resorption of S. mansoni sporocysts show a very strong decrease of their infectivity in mice. Under conditions of high interspecific competition (i.e. when the snails are infected by E. liei 8 days after infection by S. mansoni), the mean overall worm return is five times lower than that of the control experiment. A marked decrease of the infectivity of cercariae is also noted when snails, infected exclusively with either sporocysts of S. mansoni or rediae of E. liei, are associated in the same tank.

Keywords

Echinostoma lieiSchistosoma mansoniBiomphalaria glabratacercarial infectivityantagonism
Type
Research Article
Information
Journal of Helminthology , Volume 64 , Issue 1 , March 1990 , pp. 71 - 74
Copyright
Copyright © Cambridge University Press 1990

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References

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