Journal article

Larval trematode infections in freshwater snails from the highveld and lowveld areas of Zimbabwe

Chingwena G.*, Mukaratirwa S, Kristensen T, Chimbari M ...see all

Journal of Helminthology, vol. 76, issue 4 (2002) pp. 283-293

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Between November 1998 and October 2000, freshwater snails were collected monthly from the highveld and lowveld areas of Zimbabwe to determine the occurrence of larval trematodes. A total of 13,789 snails, representing ten species, were collected from 21 sites and 916 (6.6%) harboured patent trematode infections. Eight morphologically distinguishable types of cercariae were identified. Bulinus tropicus had the highest overall prevalence of infection (13.1%). The echinostome was the most common type of cercaria recovered, contributing 38.2% of all infections. Schistosoma cercariae were recovered mainly from the highveld and comprised 8.0% of all infections. Amphistome cercariae contributed 37.6% of all infections and were recorded from both the highveld and lowveld areas with a peak prevalence occurring during the post-rainy period (March-May). The main intermediate host for amphistomes was B. tropicus. Infections in B. globosus, B. forskalii and Biomphalaria pfeifferi with amphistome cercariae are new records for Zimbabwe.

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  • Chingwena G.*

  • S. Mukaratirwa

  • T.K. Kristensen

  • M. Chimbari

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