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Storage and incubation of Echinostoma revolutum eggs recovered from wild Branta canadensis, and their infectivity to Lymnaea tomentosa snails

Published online by Cambridge University Press:  12 April 2024

N.E. Davis
N.E. Davis*
Affiliation:
Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
*
*Fax: 64 3 689 7867 E-mail: davisn@xtra.co.nz
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Abstract

Echinostoma revolutum eggs recovered from naturally infected wild Canada geese (Branta canadensis) were cold stored (4–6°C) for up to 72 weeks. Successful hatching followed incubation for from 6 to 8 days at an optimum temperature of between 25 and 30°C. A partial life cycle from adult worm to metacercarial encystment in Lymnaea tomentosa snails was completed in the laboratory. Snails were infected both by free miracidia and by ingestment of unhatched embryonated eggs. Infection was equally successful in environmental temperature ranges from 10 to 25°C, and at challenge levels of 2, 5 or 10 embryonated eggs per snail. Exposure to 10 eggs was lethal. Ingestion by snails of embryonated eggs with successful infection at 10°C suggests that embryonated eggs may be used to infect wild snails when the environmental water temperature has reached 10°C.

Type
Review Article
Information
Journal of Helminthology , Volume 79 , Issue 4 , December 2005 , pp. 321 - 326
Copyright
Copyright © Cambridge University Press 2005

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