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Theses

ETUDE DE LA DYNAMIQUE DE LA TRANSMISSION DE TOXOPLASMA GONDII DANS DES MILIEUX CONTRASTES

Abstract : We studied the dynamic of the transmission of a parasite with complex life-cycle, Toxoplasma gondii, in contrasted environments. First, the dynamic of the parasite transmission was studied in an urban area where a population of domestic cats (Felis catus) live at high density. Our results raise the hypothesis that the parasite transmission could occur via a simple life-cycle when intermediate hosts are in very low density, relative to cats. We also highlighted the presence of localised areas contaminated by T. gondii oocysts, which correspond to defecation site of cats. Second, we studied the dynamic of the transmission of T. gondii in environments where intermediate hosts are in high density. We found indicators of the interspecific variability in the level of infection of intermediate hosts, such as body mass or habitat. Moreover, we showed that environment composition, climate fluctuations and the level of infection of toxoplasmosis in domestic cats and wildcats (Felis silvestris) could be related. The whole study shows the interest of an eco-epidemiological approach to understand the variability of the life-cycle of T. gondii.
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https://tel.archives-ouvertes.fr/tel-00371738
Contributor : Eve Afonso Connect in order to contact the contributor
Submitted on : Monday, March 30, 2009 - 1:47:24 PM
Last modification on : Tuesday, July 20, 2021 - 5:20:02 PM
Long-term archiving on: : Thursday, June 10, 2010 - 5:41:31 PM

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  • HAL Id : tel-00371738, version 1

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Eve Afonso. ETUDE DE LA DYNAMIQUE DE LA TRANSMISSION DE TOXOPLASMA GONDII DANS DES MILIEUX CONTRASTES. Ecologie, Environnement. Université de Reims - Champagne Ardenne, 2007. Français. ⟨tel-00371738⟩

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