This study was conducted from August 2008 to February 2010 in a selling place of imported used tires at open sky, at Koumassi in the city of Abidjan. It is a surveillance of mosquito populations, capital for the prediction and prevention of epidemics. It was conducted to identify the different species of mosquitoes present in the used tires, to determine the abundance and population dynamics of in the used tires. The sampling of immature stages was carried out by collecting water in used tires, scraping in used tires and a regular monitoring of ovitraps. Aedes aegypti was the only species encountered at residues collected in used tires and by ovitraps. It has been associated two other species encountered (Culex quinquefasciatus and Culex nebulosus) in the water collected in used tire. The Aedes aegypti density has been important at the beginning of rain season by ovitraps and during the raining season in the water collected in tires. These variations of Aedes aegypti densities would indicate that an entomological risk of emergence of an epidemic is present, and especially high throughout the raining season.
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