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

Sophie Pradier, Alain Sandoz, Mathilde C. Paul, Gaëtan Lefebvre, Annelise Tran, Josiane Maingault, Sylvie Lecollinet and Agnès Leblond
Additional contact information
Sophie Pradier: INRA, UR346 Epidémiologie Animale, Saint Genès Champanelle F-63122, France
Alain Sandoz: Centre de Recherche pour la Conservation des Zones Humides Méditerranéennes, Fondation Tour du Valat, Arles F-13200, France
Mathilde C. Paul: INRA, UMR1225, IHAP, Université de Toulouse, INP-ENVT, Toulouse F-31076, France
Gaëtan Lefebvre: Centre de Recherche pour la Conservation des Zones Humides Méditerranéennes, Fondation Tour du Valat, Arles F-13200, France
Annelise Tran: CIRAD, UPR Animal et Gestion Intégrée des Risques (AGIRs), Montpellier F-34398, France
Josiane Maingault: ANSES, Maisons-Alfort Laboratory for Animal Health, UMR1161 Virologie, INRA, ANSES, ENVA, Maisons-Alfort F-94703, France
Sylvie Lecollinet: ANSES, Maisons-Alfort Laboratory for Animal Health, UMR1161 Virologie, INRA, ANSES, ENVA, Maisons-Alfort F-94703, France
Agnès Leblond: INRA, UR346 Epidémiologie Animale, Saint Genès Champanelle F-63122, France

IJERPH, 2014, vol. 11, issue 8, 1-15

Abstract: 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.

Keywords: West Nile; France; wetlands; spatial analysis; risk factor; vector-borne diseases; remote sensing (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2014
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1660-4601/11/8/7740/pdf (application/pdf)
https://www.mdpi.com/1660-4601/11/8/7740/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:11:y:2014:i:8:p:7740-7754:d:38785

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().