[Comparison of specific composition and mosquitoes population dynamics in two villages of the centre of Côte-d'Ivoire, with and without irrigated rice growing area]

Entomological surveys were undertaken between October 1994 and August 1995 and from April to August 1995 in the villages of Kafiné and Pékaha, respectively These villages are located in the centre of Côte-d'Ivoire in a humid savannah area in the prefecture of Niakaramandougou. Rice plots are located to about 500 meters from the first habitations of Kafiné. They also form an enclosure around the village causing a great culicidian nuisance. On the other hand in the village of Pékaha, situated at 8 km from the enclosure, one can find a non-developed low ground area with swamps according to the season which has caused the multiplication of anthropophilic Culicidae. Five genera of mosquito were caught in the two villages: Anopheles, Aedes, Culex, Mansonia and Uranotaenia. The genus Anopheles is by far the most predominant in Kafiné with 84.3% (n=17556). Mansonia, Culex and Aedes respectively constitute 12%, 3% and 0.01% of the total anthropophilic mosquitoes. In the contrary the genus Mansonia was the most predominant in Pékaha with 78.2% (n=6642). Anopheles, Aedes and Culex respectively represent 13.2%, 8.3% and 0.1% of the total number of mosquitoes caught during the surveys. If in the village of Kafiné, the culicidian nuisance is mainly due to anopheles mosquitoes (84.3%) and particularly to An. gambiae s.s. (70.6%), in the village of Pékaha, dwellers suffer more from Mansonia (78.2%) bites than those of Anopheles (13.2%).