Importance of wetlands management for West Nile virus circulation risk, Camargue, Southern France

Pradier Sophie, Sandoz Alain, Paul Mathilde, Lefebvre Gaëtan, Tran Annelise, Maingault Josiane, Lecollinet Sylvie, Leblond Agnès. 2014. Importance of wetlands management for West Nile virus circulation risk, Camargue, Southern France. International Journal of Environmental Research and Public Health, 11 (8) : 7740-7754.

Quartile : Q2, Sujet : ENVIRONMENTAL SCIENCES

Résumé : To assess environmental and horse-level risk factors associated with West Nile Virus (WNV) circulation in Camargue, Southern France, a serosurvey was conducted on non-vaccinated horses (n = 1159 from 134 stables) in 2007 and 2008. Fifteen Landsat images were examined to quantify areas with open water and flooded vegetation around sampled horses. Mean percentages of areas of open water and flooded vegetation, as well as variations in these percentages between 3 periods (November to February = NOT, March to July = END and August to October = EPI), were calculated for buffers of 2 km radius around the stables. Results of the final logistic regression showed that the risk of WNV seropositivity in horses decreased with their date of acquisition and age. Results also demonstrated the significant role of environmental variables. Horse serological status was associated with variations of open water areas between the NOT (November to February) and END (March to July) periods, as well as between END and EPI (August to October). WNV spillover was found more intense in areas where water level decreased strongly from winter to spring and from spring to summer.

Mots-clés Agrovoc : cheval, flavivirus, zone humide, Enquête pathologique, surveillance épidémiologique, facteur de risque, facteur du milieu, gestion de l'environnement, gestion du risque, télédétection, impact sur l'environnement, transmission des maladies, maladie transmise par vecteur, Landsat

Mots-clés géographiques Agrovoc : France, région méditerranéenne

Mots-clés complémentaires : Fièvre du Nil occidental

Mots-clés géographiques complémentaires : Camargue

Classification Agris : L73 - Maladies des animaux
L72 - Organismes nuisibles des animaux

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

• Pradier Sophie, ENVT (FRA)
• Sandoz Alain, La Tour du Valat, Centre de recherche pour la conservation des zones humides méditerranéennes (FRA)
• Paul Mathilde, ENVT (FRA)
• Lefebvre Gaëtan, La Tour du Valat, Centre de recherche pour la conservation des zones humides méditerranéennes (FRA)
• Tran Annelise, CIRAD-ES-UPR AGIRs (FRA) ORCID: 0000-0001-5463-332X
• Maingault Josiane, ENVA (FRA)
• Lecollinet Sylvie, ANSES (FRA) ORCID: 0000-0001-8535-2133
• Leblond Agnès, ENVL (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/574385/)

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