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Observations on the post-mortem migration of nematode larvae and its role in tissue digestion techniques

Published online by Cambridge University Press:  05 June 2009

Paul Prociv
Paul Prociv
Affiliation:
Department of Parasitology, The University of Queensland, St Lucia, Queensland 4067, Australia
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Abstract

The importance of larval viability in relation to the success of recovery techniques and to the interpretation of histological and migration studies was tested using mice infected with Toxocara pteropodis, T. canis and T. cati. Little difference was found in total numbers of viable larvae recovered from tissues incubated for 18 hours in 0·85% saline, 2% trypsin or 1% pepsin, but the rates of larval egress did vary. The recovery of dead larvae by digestion techniques was much lower. Larvae migrated in tissues undergoing fixation, which influenced histological findings. Larvae of T. canis did not undergo significant peritoneal migration in acutely-infected mice, but did penetrate their intestinal walls in large numbers within 4 hours of death. The implications of these findings in experimental studies are discussed.

Keywords

Toxocara pteropodisToxocara canisToxocara catiAscaris lumbricoidesdigestion techniquesnematode larvaelarval migrationmous
Type
Research Article
Information
Journal of Helminthology , Volume 63 , Issue 4 , December 1989 , pp. 281 - 286
Copyright
Copyright © Cambridge University Press 1989

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