Folia Parasitologica 50[1] 57-60 (2003) | DOI: 10.14411/fp.2003.011

Toxicity of cadmium and zinc to the cercarial activity of Diplostomum spathaceum (Trematoda: Diplostomidae)

Neil J. Morley, Mark Crane, John W. Lewis
School of Biological Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK

The toxicity of cadmium and zinc at concentrations ranging from 0.1 to 100 µg/l was investigated against the activity of Diplostomum spathaceum (Rudolphi, 1819) cercariae. Over a 24 h exposure period a significant reduction in cercarial activity occurred in solutions of cadmium, zinc, and a mixture of cadmium and zinc at all concentrations. Reduced cercarial activity also occurred in all toxicant solutions compared with controls after only 6 h exposure indicating that cercariae were vulnerable during the period of maximum cercarial infectivity (0-5 h). The mechanisms of metal toxicity and their importance to parasite transmission are discussed.

Keywords: Diplostomum spathaceum, cercariae, activity, cadmium, zinc

Received: September 2, 2002; Accepted: November 29, 2002; Published: March 1, 2003  Show citation

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Morley, N.J., Crane, M., & Lewis, J.W. (2003). Toxicity of cadmium and zinc to the cercarial activity of Diplostomum spathaceum (Trematoda: Diplostomidae). Folia Parasitologica, 50(1), 57-60. doi: 10.14411/fp.2003.011
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