West Nile Virus Transmission in Sentinel Chickens and Potential Mosquito Vectors, Senegal River Delta, 2008–2009

Assane Gueye Fall, Amadou Diaïté, Momar Talla Seck, Jérémy Bouyer, Thierry Lefrançois, Nathalie Vachiéry, Rosalie Aprelon, Ousmane Faye, Lassana Konaté and Renaud Lancelot
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Assane Gueye Fall: Laboratoire National d'Elevage et de Recherche Vétérinaire, Institut Sénégalais de Recherches Agricoles, Dakar-Hann BP 2057, Senegal
Amadou Diaïté: Laboratoire National d'Elevage et de Recherche Vétérinaire, Institut Sénégalais de Recherches Agricoles, Dakar-Hann BP 2057, Senegal
Momar Talla Seck: Laboratoire National d'Elevage et de Recherche Vétérinaire, Institut Sénégalais de Recherches Agricoles, Dakar-Hann BP 2057, Senegal
Jérémy Bouyer: Laboratoire National d'Elevage et de Recherche Vétérinaire, Institut Sénégalais de Recherches Agricoles, Dakar-Hann BP 2057, Senegal
Thierry Lefrançois: Unité Mixte de Recherche Contrôle des Maladies Animales Exotiques et Emergentes (UMR CMAEE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Montpellier 34398, France
Nathalie Vachiéry: UMR CMAEE, INRA, Petit Bourg 97170, Guadeloupe, France
Rosalie Aprelon: UMR CMAEE, INRA, Petit Bourg 97170, Guadeloupe, France
Ousmane Faye: Faculté des Sciences et Techniques, Département de Biologie Animale, Cheikh Anta Diop University, Dakar BP 5005, Senegal
Lassana Konaté: Faculté des Sciences et Techniques, Département de Biologie Animale, Cheikh Anta Diop University, Dakar BP 5005, Senegal
Renaud Lancelot: Unité Mixte de Recherche Contrôle des Maladies Animales Exotiques et Emergentes (UMR CMAEE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Montpellier 34398, France

IJERPH, 2013, vol. 10, issue 10, 1-10

Abstract: West Nile virus (WNV) is an arthropod-borne Flavivirus usually transmitted to wild birds by Culex mosquitoes. Humans and horses are susceptible to WNV but are dead-end hosts. WNV is endemic in Senegal, particularly in the Senegal River Delta. To assess transmission patterns and potential vectors, entomological and sentinel serological was done in Ross Bethio along the River Senegal. Three sentinel henhouses (also used as chicken-baited traps) were set at 100 m, 800 m, and 1,300 m from the river, the latter close to a horse-baited trap. Blood samples were taken from sentinel chickens at 2-week intervals. Seroconversions were observed in sentinel chickens in November and December. Overall, the serological incidence rate was 4.6% with 95% confidence interval (0.9; 8.4) in the sentinel chickens monitored for this study. Based on abundance pattern, Culex neavei was the most likely mosquito vector involved in WNV transmission to sentinel chickens, and a potential bridge vector between birds and mammals.

Keywords: West Nile virus; sentinel chicken; mosquito; Culex; Senegal River Delta (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2013
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