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Acquired immunity against Trypanosoma danilewskyi in goldfish, Carassius auratus

Published online by Cambridge University Press:  08 November 2011

Patrick T.K. Woo
Patrick T.K. Woo
Affiliation:
Department of Zoology, College of Biological Science, University of Guelph, Ghielph, Ontario, Canada
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Summary

Two groups of goldfish maintained at 20°C were experimentally infected with two different sized inocula of Trypanosoma danilewskyi. One group was inoculated with 380000 trypanosomes/fish and the other with 3800. Forty and 90% of the fish, respectively, survived. All surviving fish challenged 190 days post-infection were protected from re-infection. The plasma of these fish when inoculated into another group of fish also protected them from infection. Finally, trypanosomes incubated in vitro in immune plasma at 20°C for 2 h were not infective; however, incubations at 5°C or for 1 h were not as effective.

Type
Research Article
Information
Parasitology , Volume 83 , Issue 2 , October 1981 , pp. 343 - 346
Copyright
Copyright © Cambridge University Press 1981

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