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Évaluation de l'impact et de l'efficacité de la surveillance et de la lutte de la fièvre catarrhale ovine en France

Abstract : Bluetongue virus (BTV) serotype 8 had a strong economic impact on the cattle industry during the epizootic between 2006 and 2009 in France. This thesis aimed to evaluate the financial impact of BTV diffusion after its re-emergence in 2015, and to bring new insights into the dynamics of Culicoides, and the surveillance and control system. By collecting and analyzing data, we were able to calculate the cost of surveillance system from September 2015 to December 2016 (€ 14.6 million excluding taxes). Thanks to the analysis of historical data on cattle movements, we were able to highlight changes in movement dynamics for farms according to their health status, as well as to estimate excess bovine mortality related to the circulation of BTV. By using catch data from Culicoides, we were able to establish a model for predicting the abundance of these vectors, validating at the same time the use of vector zones in entomological surveillance. We finally used an existing model to highlight results disparity according to several surveillance and control system against BTV. We have established that programmed surveillance does not provide relevant efficiency in the context of detecting a high-impact disease such as BTV, while movement restriction measures play an essential role in the preservation of the cattle industry against the BTV
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Submitted on : Monday, March 30, 2020 - 2:15:12 PM
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Pierre Villard. Évaluation de l'impact et de l'efficacité de la surveillance et de la lutte de la fièvre catarrhale ovine en France. Santé publique et épidémiologie. Université de Lyon, 2019. Français. ⟨NNT : 2019LYSE1351⟩. ⟨tel-02524618⟩

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