Journal ArticleDOI
Fasciola hepatica and Paramphistomum daubneyi: field observations on the transport and outcome of floating metacercariae in running water.
Daniel Rondelaud,Philippe Vignoles,C. Vareille-Morel,M. Abrous,C. Mage,Roselyne Mouzet,Gilles Dreyfuss +6 more
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TLDR
The weak buoyancy of these floating cysts on running water limited their dispersal and led to a real diminution of risks incurred by definitive hosts towards these metacercariae.Abstract:
Experimental investigations in eight open drainage ditches and furrows from central France were carried out to analyse the dispersal of floating metacercariae of two digenean species by running water and to determine the outcome of larvae which settled on Nasturtium officinale (watercress). The frequencies of larvae found after their transport by water ranged from 33% to 49.7%, thus indicating that more than half of the metacercariae used in this experiment had fallen to the bottom of the water during this transport. The nature of the site (furrow, or ditch supplied by a spring) had a significant effect on the distribution of floating larvae, while the digenean species had no effect. Low percentages of metacercariae on watercress were noted in furrows (3.5-4.3% of larvae) and ditches (0.8-1.3%). When the watercress grew, most larvae that had settled on leaves and stems died but there were always several living metacercariae on this plant (0.7-1.5% of larvae for Fasciola hepatica and 0.2-0.5% for Paramphistomum daubneyi). The weak buoyancy of these floating cysts on running water limited their dispersal and, consequently, led to a real diminution of risks incurred by definitive hosts towards these metacercariae.read more
Citations
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Journal ArticleDOI
Human fascioliasis infection sources, their diversity, incidence factors, analytical methods and prevention measures
TL;DR: The high diversity of infection sources and their heterogeneity in different countries underlie the large epidemiological heterogeneity of human fascioliasis throughout.
Book ChapterDOI
Ecology of free-living metacercariae (Trematoda).
TL;DR: A novel synthesis of free-living metacercariae using epibiosis as the basis of a new framework to describe the relationship between transport hosts and parasites is presented.
Journal Article
Estudio del foco en un caso de fasciolosis humana en Neuquen
Diana Rubel,Lucila Prepelitchi,Florencia Kleiman,Silvana Carnevale,Cristina Wisnivesky-Colli +4 more
TL;DR: Coprological analysis showed F. hepatica eggs in 100% of goats, 82% of sheep and 86% of bovines, and local veterinary control programs were apparently not effective in this case.
Journal ArticleDOI
Wherefrom and whereabouts of an alien: the American liver fluke Fascioloides magna in Austria: an overview.
Helmut Sattmann,Christoph Hörweg,Larissa Gaub,Anna Sophia Feix,Michaela Haider,Julia Walochnik,Wolfgang Rabitsch,Heinrich Prosl +7 more
TL;DR: Assessment of introduction pathways and dispersal, continuous monitoring of host abundance and distribution and the prevalence of flukes in intermediate and final hosts, as well as coordinated and concerted actions with neighbouring countries are recommended.
Journal ArticleDOI
Natural prevalence in Cuban populations of the lymnaeid snail Galba cubensis infected with the liver fluke Fasciola hepatica : small values do matter
Antonio A. Vázquez,Jorge Sánchez,Annia Alba,Jean-Pierre Pointier,Sylvie Hurtrez-Boussès,Sylvie Hurtrez-Boussès +5 more
TL;DR: The results suggest that fasciolosis transmission may occur even when the number of infected snails remains relatively low, as well as suggesting the existing compatibility in host–parasite interactions may be explored.
References
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Journal Article
Proposition d'une technique simple pour la production metacercarienne de fasciola hepatica linne a partir du mollusque lymnaea truncatula muller
A propos de 18 cas de fasciolose humaine recensés en Basse-Normandie années 1994-1995
TL;DR: In this paper, plusieurs cas de distomatose humaine ont pu etre recenses dans les departements de Basse-Normandie (Manche, Calvados, Orne) au cours des annees 1994/1995.
Les métacercaires «flottantes» de Fasciola hepatica L. A propos de quelques observations sur leur structure et leurs variations numériques au cours d'une infestation expérimentale chez Lymnae truncatula Müller
TL;DR: Les metacercaires «flottantes» representent 6,8% des parasites que 173 Limnees tronquees ont emis au cours d'une infestation experimentale.