Fasciola hepatica: Characteristics of Infection in Lymnaea truncatula in Relation to the Number of Miracidia at Exposure

Authors: Dreyfuss G.¹; Vignoles P.²; Rondelaud D.³; Vareille-Morel C.⁴

Source: Experimental Parasitology, Volume 92, Number 1, May 1999 , pp. 19-23(5)

Publisher: Academic Press

Abstract:

Dreyfuss, G., Vignoles, P., Rondelaud, D., and Vareille-Morel, C. 1999. Fasciola hepatica: Characteristics of infection in Lymnaea truncatula in relation to the number of miracidia at exposure. Experimental Parasitology 92, 19–23. Experimental infections of Lymnaea truncatula by Fasciola hepatica were carried out in three snail populations to determine whether the number of miracidia used for each snail at exposure (1, 2, 5, 10, or 20 per snail) had any influence on the characteristics of Fasciola infection and metacercarial production. The number of miracidia had a significant influence on snail survival at day 30 postexposure and the frequency of infected L. truncatula that died without shedding (NCS snails). The frequency of NCS snails, the growth of cercaria-shedding snails throughout the experiment, the time between exposure and the first cercarial shedding, the duration of shedding, and the number of metacercariae were independent of the number of miracidia used for each snail. The highest metacercaria productivity for each miracidium was found in single-miracidium infections. Single-miracidium infections were the most effective, as the mean number of cercariae was the same as in other groups, whereas their survival rate was much higher. Copyright 1999 Academic Press.

Language: English

Document Type: Research article

Affiliations: 1: Laboratoire de Parasitologie 2: Laboratoire de Biophysique-Informatique, Faculté de Pharmacie 3: Laboratoire d'Histopathologie Parasitaire, Faculté de Médecine, 2, rue du Docteur Raymond Marcland, Limoges Cedex, 87025, France 4: Laboratoire de Malacologie Appliquée, Faculté des Sciences, 123, avenue Albert Thomas, Limoges Cedex, 87060, France

Publication date: 1999-05-01

• In this: publication
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• In this Subject: Zoology ,  Internal Medicine
• By this author: Dreyfuss G. ;  Vignoles P. ;  Rondelaud D. ;  Vareille-Morel C.

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