Foraging range of arthropods with veterinary interest: New insightsfor Afrotropical Culicoides biting midges (Diptera: Ceratopogonidae)using the ring method [texte imprimé] / M. T. Bakhoum, Auteur ; M. Fall, Auteur ; Mor Talla Seck, Auteur ; L Gardés, Auteur ; A G Fall, Auteur ; M. Diop, Auteur ; I Mall, Auteur ; T Balenghien, Auteur ; T Baldet, Auteur ; Geoffrey Gimonneau, Auteur ; C Garros, Auteur ; Jérémy Bouyer, Auteur . - Dakar (PRH, Sénégal) : ISRA/LNERV, 2015 . - 09p.
Langues : Anglais (eng)

Catégories :	SCIENCES, PRODUCTION ET PROTECTION ANIMALES
Mots-clés :	Culicoides, Identification de Masse, Fourrage, Pathologie du Cheval, Sénégal, Afrique de L'ouest
Index. décimale :	L730-Maladie des animaux
Résumé :	tThe identification of blood meal source of arthropod vector species contributes to the understanding ofhost-vector-pathogen interactions. The aim of the current work was to identify blood meal source inCulicoides biting midge species, biological vectors of internationally important arboviruses of livestockand equids, using a new ecological approach. We examined the correlation between blood meal sourceidentified in engorged Culicoides females collected in a suction light trap and the available vertebratehosts along four rings (200, 500, 1000 and 2000 m) centered at the trap site and described the foragingrange of the three main vector species of veterinary interest present in the study area, Culicoides imicola,Culicoides kingi and Culicoides oxystoma. The study was performed in four sites localized in the Niayesregion of Senegal (West Africa) where recent outbreaks of African horse sickness occurred. Blood mealsource identification was carried out by species-specific multiplex PCRs with genomic DNA extractedfrom the abdomen of engorged females collected during nine night collections for twenty-six collections.The four most abundant hosts present in the studied area (horse, cattle, goat and sheep) were surveyedin each ring zone. The blood meal source varied according to Culicoides species and host availability ineach site. C. oxystoma and C. imicola females mainly fed on horses readily available at 200 m maximumfrom the trap location whereas females of C. kingi fed mainly on cattle, at variable distances from thetraps (200 to 2000 m). C. oxystoma may also feed on other vertebrates. We discuss the results in relationwith the transmission of Culicoides-borne arboviruses and the species dispersion capacities.