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Interference with Fasciola hepatica snail finding by various aquatic organisms

Published online by Cambridge University Press:  06 April 2009

Niels Ørnbjerg Christensen ,
Peter Nansen  and
Flemming Frandsen
Niels Ørnbjerg Christensen
Affiliation:
Danish Bilharziasis Laboratory, Jœgersborg Allé 1 D, DK-2920 Charlottenlund, Denmark
Peter Nansen
Affiliation:
The Danish Agricultural and Verterinary Research Council, Parasitological Research Group, Royal Veterinary and Agricultural University, Bülowsvej 13, DK-1870 Copenhagen V, Denmark
Flemming Frandsen
Affiliation:
Danish Bilharziasis Laboratory, Jœgersborg Allé 1 D, DK-2920 Charlottenlund, Denmark
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Extract

Previous studies using radioactive miracidia have shown that a number of non-host snails and bivalves, interposed as ‘decoys’ in linear test channels, may interfere with the capacity of Fasciola hepatica miracidia to infect Lymnaea truncatula. Applying similar experimental principles, the role of several other potential interferents have been analysed in the present study. Daphnia pulex (Cladocera) and larvae of Corethra sp. (Diptera) exercised significant interfering effects by protecting ‘target’ snails from infection. Evidence suggested that this effect was a result of their normal predatory behaviour. Other organisms including Herpobdella testacea and Helobdella stagnalis (Hirudinea), Acellus aquaticus (Isopoda), Planaria lugubris (Turbellaria) and L. Truncatula egg clusters failed to interfere with miracidial host-finding. Nor did P. lugubris and L. truncatula ‘conditioned water’ interfere with the capacity of the miracidia to infect their host snail.

Type
Research Article
Information
Parasitology , Volume 74 , Issue 3 , June 1977 , pp. 285 - 290
Copyright
Copyright © Cambridge University Press 1977

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References

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