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首页> 外文期刊>Journal of Medical Entomology >The Chagas vector, Triatoma dimidiata (Hemiptera : Reduviidae), is panmictic within and among adjacent villages in Guatemala
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The Chagas vector, Triatoma dimidiata (Hemiptera : Reduviidae), is panmictic within and among adjacent villages in Guatemala

机译：恰加斯（Chagas）媒介Triatoma dimidiata（Hemiptera：Reduviidae）在危地马拉的相邻村庄之内和之中都是大片的

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摘要

Trypanosoma cruzi, the hemoflagellate parasite and cause of Chagas disease in Latin America, is carried by Triatomine vectors, principally Triatoma dimidiata and Rhodnius prolixiis in Central America. To assist control efforts and to understand the epidemiology of the disease in Guatemala, the population genetics of T dimidiata was analyzed among three houses within a village and two adjacent villages in Guatemala. Eleven Randomly Amplified Polymorphic DNA-polymerase chain reaction (RAPD-PCR) primers were screened and three used to amplify bands, 29 of which were scored, from T dimidiata DNA of approximate to50 bugs per house from three houses within a village and from 66 and 33 bugs, respectively, from adjacent villages. Results show very small genetic distances among the three T dimidiata subpopulations from the houses (D = 0.013-0.022) and the two villages (D = 0.0199). The amount of differentiation among houses (fixation index, F-ST) was also very small, F-ST = 0.025 among the houses and the two villages F-ST = 0.019. These fixation indices give an average number of mating migrants per generation (Nm) of 9.7 (among houses) and 12 (among villages). Average heterozygosity (H) appears to be high, ranging from H = 0.299 - 0.325 among the houses and H = 0.273 among the villages. The low genetic distance and fixation indices, and high heterozygosity suggest that the subpopulations in the houses and in the adjacent villages are not reproductively isolated but are in fact, one large panmictic population. Therefore the geographic coverage necessary for effective control must include, at least, the area encompassing adjacent villages.
机译：锥虫锥虫（Trypanosoma cruzi）是拉丁美洲的南美锥虫病的鞭毛虫病和病因，由中美洲的Triatomine媒介携带，主要是Triatoma dimidiata和Rhodnius prolixiis。为帮助控制工作并了解危地马拉的疾病流行病学，对危地马拉一个村庄内的三个房屋和两个相邻村庄中的丁二叶蚊的种群遗传学进行了分析。筛选了11个随机扩增的多态性DNA聚合酶链反应（RAPD-PCR）引物，并用三个引物扩增了条带，从一个村庄中的三个房屋中的每个房屋的T dimidiata DNA中获得了大约50个虫子的分数，分别从66个和来自邻近村庄的33只虫子。结果表明，三个三叉戟亚种亚群之间的遗传距离非常小（D = 0.013-0.022）和两个村庄（D = 0.0199）。房屋之间的差异（固定指数，F-ST）也很小，房屋之间的F-ST = 0.025，两个村庄之间的F-ST = 0.019。这些固定指数给出的平均每代人口（Nm）为9.7（在房屋中）和12（在村庄中）。平均杂合度（H）似乎很高，房屋之间的H = 0.299-0.325，村庄之间的H = 0.273。较低的遗传距离和固定指数以及较高的杂合度表明，房屋和邻近村庄中的亚种群不是生殖隔离的，而是事实上的一大恐慌种群。因此，有效控制所必需的地理覆盖范围必须至少包括包围相邻村庄的区域。

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