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来自巴西、美国和开曼群岛的白纹伊蚊对登革热病毒和黄热病病毒的媒介能力存在较大遗传分化且变异较低。

Large genetic differentiation and low variation in vector competence for dengue and yellow fever viruses of Aedes albopictus from Brazil, the United States, and the Cayman Islands.

作者信息

Lourenço de Oliveira Ricardo, Vazeille Marie, de Filippis Ana Maria Bispo, Failloux Anna-Bella

机构信息

Laboratório de Transmissores de Hematozoários, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil.

出版信息

Am J Trop Med Hyg. 2003 Jul;69(1):105-14.

PMID:12932107
Abstract

We conducted a population genetic analysis of Aedes albopictus collected from 20 sites in Brazil, the United States (Florida, Georgia, and Illinois), and the Cayman Islands. Using isoenzyme analysis, we examined genetic diversity and patterns of gene flow. High genetic differentiation was found among Brazilian samples, and between them and North American samples. Regression analysis of genetic differentiation according to geographic distances indicated that Ae. albopictus samples from Florida were genetically isolated by distance. Infection rates with dengue and yellow fever viruses showed greater differences between two Brazilian samples than between the two North American samples or between a Brazilian sample and a North American sample. Introductions and establishments of new Ae. albopictus populations in the Americas are still in progress, shaping population genetic composition and potentially modifying both dengue and yellow fever transmission patterns.

摘要

我们对从巴西、美国（佛罗里达州、佐治亚州和伊利诺伊州）以及开曼群岛的20个地点采集的白纹伊蚊进行了群体遗传学分析。通过同工酶分析，我们研究了遗传多样性和基因流动模式。在巴西样本之间以及它们与北美样本之间发现了高度的遗传分化。根据地理距离对遗传分化进行的回归分析表明，佛罗里达州的白纹伊蚊样本在遗传上按距离隔离。登革热病毒和黄热病病毒的感染率在两个巴西样本之间的差异大于两个北美样本之间或一个巴西样本与一个北美样本之间的差异。美洲新的白纹伊蚊种群的引入和建立仍在进行中，正在塑造群体遗传组成，并有可能改变登革热和黄热病的传播模式。

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