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Single and multiple worm infections of Echinostoma caproni (Trematoda) in the golden hamster

Published online by Cambridge University Press:  05 June 2009

Bernard Fried ,
Jane E. Huffman  and
Patricia M. Weiss
Bernard Fried
Affiliation:
Department of Biology, Lafayette College, Easton, PA 18042, USA
Jane E. Huffman
Affiliation:
Department of Biological Sciences, East Stroudsburg University, East Stroudsburg, PA 18301, USA
Patricia M. Weiss
Affiliation:
Department of Biological Sciences, East Stroudsburg University, East Stroudsburg, PA 18301, USA
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Abstract

Six of 10 hamsters fed a single metacercarial cyst of Echinostoma caproni (single-worm infections) and 13 of 19 hamsters fed either 2 or 5 cysts (multiple-worm infections) were infected with adult echinostomes at necropsy 22 days post-infection. Considerable histopathological changes to the small intestine occurred in hamsters carrying single-worm infections. There were no differences in either mean length, width or wet weight of echinostomes in single- versus multiple-worm infections. The mean number of eggs/worm from single-worm infections (525) was significantly greater than that from multiple-worm infections (288). The average percentage of fully developed miracidia/worm from single worms (94%) was similar to that from worms in multiple infections (92–95%). Single worms of E. caproni were capable of self-fertilization and production of viable eggs. Miracidia derived from single worms were as capable of infecting laboratory-reared Biomphalaria glabrata and producing patent rediae as were those from multiple infections.

Keywords

Echinostoma capronihamsterinfectivitysingle-worm infectionsmultiple-worm infectionsself-fertilization
Type
Research Article
Information
Journal of Helminthology , Volume 64 , Issue 1 , March 1990 , pp. 75 - 78
Copyright
Copyright © Cambridge University Press 1990

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