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Endemic echinostome infections of candidate hosts

Published online by Cambridge University Press:  12 April 2024

N.E. Davis*
Affiliation:
Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
*
*Fax: +64 3 689 7867, E-mail: [email protected]
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Abstract

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Wild Lymnaea tomentosa snails, recovered from Lake Wanaka, New Zealand, were established in the laboratory. Wild snails, naturally infected with echinostomes, provided metacercariae for infection of laboratory maintained snails. Metacercarial cysts from wild and laboratory snails were then used to attempt infection of definitive host candidates. Laboratory snails provided convenient packaging of known numbers of cysts. Metacercariae excysted in the small intestines of ducklings to mature in 6 days. Worms were expelled as they became gravid. Attempts to establish infections in experimental hosts other than ducklings were not successful. No worms were recovered from mice, white rats, guinea pigs, hamsters or immunosuppressed white rats.

Type
Review Article
Copyright
Copyright © Cambridge University Press 2005

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