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Genetic structure of Aedes aegypti populations in Chiang Mai (Thailand) and relation with dengue transmission

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We analysed the population genetic structure and differentiation regarding vector competence for a dengue virus of 15 Aedes aegypti samples collected from Chiang Mai in northern Thailand. Based on polymorphism of 10 isoenzyme loci, genetic differentiation was confirmed among samples collected in different subdistricts (high FST values and P < 0.05). Based on infection rate for a dengue 2 virus, susceptibilities were similar in mosquitoes collected in San Nuea subdistrict and in Choeng Doi subdistrict, and were heterogeneous in populations sampled in other subdistricts. These findings are discussed and related to insecticide treatments.
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Keywords: Aedes aegypti; Thailand; dengue transmission; genetic structure; vector competence

Document Type: Research Article

Affiliations: 1: Unité d'Ecologie des Systèmes Vectoriels, Institut Pasteur, Paris, France. 2: Vector Borne Disease Control, Chiang Mai, Thailand

Publication date: 01 October 2002

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