Low west nile virus circulation in wild birds in an area of recurring outbreaks in Southern France

Balança Gilles, Gaidet Nicolas, Savini Giovanni, Vollot Benjamin, Foucart Antoine, Reiter Paul, Boutonnier Alain, Lelli Rossela, Monicat François. 2009. Low west nile virus circulation in wild birds in an area of recurring outbreaks in Southern France. Vector Borne and Zoonotic Diseases, 9 (3) : pp. 737-741.

Journal article ; Article de revue à facteur d'impact
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Abstract : West Nile virus (WNV) has a history of irregular but recurrent epizootics in countries of Mediterranean and of Central and Eastern Europe. We have investigated the temporal enzootic activity of WNV in free-ranging birds over a 3-year period in an area with sporadic occurrences of WNV outbreaks in Southern France. We conducted an intensive serologic survey on several wild bird populations (>4000 serum samples collected from 3300 birds) selected as potential indicators of the WNV circulation. WNV antibodies were detected by seroneutralization and=or plaque reduction neutralization in house sparrows, black-billed magpies, and scops owls, but these species appeared to be insufficient indicators of WNV circulation. Overall seroprevalence was low (<1%), including in birds that had been potentially exposed to the virus during recent outbreaks. However, the detection of a seroconversion in one bird, as well as the detection of seropositive birds in all years of our monitoring, including juveniles, indicate a constant annual circulation of WNV at a low level, including in years without any detectable emergence of WN fever in horses or humans. (Résumé d'auteur)

Mots-clés Agrovoc : Oiseau, Vecteur de maladie, Flavivirus, Sérologie, Animal sauvage, Distribution des populations, Surveillance épidémiologique, Épidémiologie

Mots-clés géographiques Agrovoc : France, Région méditerranéenne

Mots-clés complémentaires : Fièvre du Nil occidental

Mots-clés géographiques complémentaires : Camargue

Classification Agris : L73 - Animal diseases
L72 - Pests of animals

Champ stratégique Cirad : Axe 4 (2005-2013) - Santé animale et maladies émergentes

Auteurs et affiliations

  • Balança Gilles, CIRAD-ES-UPR AGIRs (FRA)
  • Gaidet Nicolas, CIRAD-ES-UPR AGIRs (FRA)
  • Savini Giovanni, IZSA&M (ITA)
  • Vollot Benjamin, Parc ornithologique de Port de Gau (FRA)
  • Foucart Antoine, CIRAD-BIOS-UPR Acridologie (FRA)
  • Reiter Paul, Institut Pasteur (FRA)
  • Boutonnier Alain, Institut Pasteur (FRA)
  • Lelli Rossela, IZSA&M (ITA)
  • Monicat François, CIRAD-ES-UPR AGIRs (FRA)

Source : Cirad - Agritrop (

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