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J Med Entomol. 2001 Sep;38(5):740-5.

Overproduced esterases in Culex pipiens quinquefasciatus (Diptera: Culicidae) from Vietnam.

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Institut des Sciences de l'Evolution (UMR 5554), Génétique et Enivironnement, Université de Montpellier-2 (CC 065), France.


The electrophoretic polymorphism of loci encoding for 10 enzymes was studied in Culex p. quinquefasciatus Say from six localities of Vietnam. The analysis of 11 "neutral genes" showed that differentiation among samples was low, but significant (Fst = 0.06), and significantly related to geographic distance between sample sites. These results are similar to those observed in other countries (Europe and west Africa). A single type of overproduced esterases (A2-B2) was observed, and its frequency was high (60-100%) in all samples. This situation is in sharp contrast with that observed in other countries of South East Asia (China, South Korea and Japan), where two or more types of overproduced esterases have been reported. A map summarizing the geographic distribution of Asian Cr. p. quinquefasciatus with overproduced esterases is provided.

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