Importance of Wetlands Management for West Nile Virus Circulation Risk, Camargue, Southern France

International Journal of Environmental Research and Public Health

Sophie Pradier⁵  Alain Sandoz⁴  Mathilde C. Paul¹  Gaëtan Lefebvre⁴  Annelise Tran³  Josiane Maingault²  Sylvie Lecollinet² 

[1] INRA, UMR1225, IHAP, Université de Toulouse, INP-ENVT, Toulouse F-31076, France; E-Mail:;ANSES, Maisons-Alfort Laboratory for Animal Health, UMR1161 Virologie, INRA, ANSES, ENVA, Maisons-Alfort F-94703, France; E-Mails:;CIRAD, UPR Animal et Gestion Intégrée des Risques (AGIRs), Montpellier F-34398, France; E-Mail:;Centre de Recherche pour la Conservation des Zones Humides Méditerranéennes, Fondation Tour du Valat, Arles F-13200, France; E-Mails:;INRA, UR346 Epidémiologie Animale, Saint Genès Champanelle F-63122, France; E-Mail:

关键词: West Nile;    France;    wetlands;    spatial analysis;    risk factor;    vector-borne diseases;    remote sensing;   

DOI  :  10.3390/ijerph110807740

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.