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Utilisation de l'espace par les hôtes du Ténia multiloculaire (Echinococcus multilocularis): conséquences épidémiologiques

Abstract : The life cycle of Ecbinococcus multilocularis was studied in Franche-Comté (France) according to (i) the distribution of prevalences in foxes (Vulpes vulpes) on regional scale, (ii) the distribution of human cases, on regional scale, and (iii) the distribution of rodents, foxes , wild cat (Felis silvestris), and domestic cat (Felis catus), on a more local scale, namely that of their biotope (study area: 14 square kilometers). The study was carried out at the community level. Comparisons were made with the other levels and they corroborate the following hypothesis: the life cycle of Ecbinococcus multilocularis is sustained in Franche-Comté because it works in a shifting functionnal mosaïc. The parasite of foxes and rodents exists temporarily in patches of about 400 square kilometers (patch). It persists in the region by shifting to non infested patches, foxes being the main vector. At the patch scale, the infestation is determined by the convergence of abiotic (mesoclimatology), and biotic factors (populations kinetics of rodents determined by land use patterns, and foxes foraging for preys). The functioning of the whole mosaic is based on relationships and dynamics whose study must span several nested space-time hierarchies (local scale: eggs preservation according to soil conditions and seasonal climatology; patch scale: distribution and density of rodents populations; regional scale: kinetics of rodents population, according to land use patterns and patch spatial distribution).
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  • HAL Id : tel-00522886, version 1

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Patrick Giraudoux. Utilisation de l'espace par les hôtes du Ténia multiloculaire (Echinococcus multilocularis): conséquences épidémiologiques. Ecologie, Environnement. Université de Bourgogne, 1991. Français. ⟨tel-00522886⟩

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