Malaria vectors in the Republic of Benin: Distribution of species and molecular forms of the Anopheles gambiae complex
Malaria vectors in the Republic of Benin: Distribution of species and molecular forms of the Anopheles gambiae complex
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DOI：
10.1016/j.actatropica.2010.02.001
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发表时间：
2010-05-01
期刊：
影响因子：
2.7
通讯作者：
Chandre, Fabrice
中科院分区：
文献类型：
--
作者：
Djogbenou, Luc;Pasteur, Nicole;Chandre, Fabrice
冈比亚按蚊复合体的成员是世界上最好的疟疾媒介之一，2006年和2007年，在贝宁不同的生物气候区进行了大规模的冈比亚按蚊抽样调查。（西非）这项研究的目的是整理数据的相对频率的物种和形式内的冈比亚复杂，并产生一个地图，空间分布在30个地点取样，分析了2122只雌虫。总体收集显示所有冈比亚人占优势，但出乎意料。在几内亚沿海生物气候区发现了一种阿拉伯种，其特征是年平均降雨量大于1500 mm，而以前只有冈比亚种。我们对贝宁的研究表明，安。在1717株冈比亚种中，M型占26.5%，S型占73.3%。M型和S型的杂交标本很少（0.2%），只有M型的空间分布似乎主要是生物气候区的函数，本文讨论了影响这些疟疾媒介分布的因素。这项研究强调了进一步调查这些物种和形式的生物，生态和行为特征的必要性，以更好地了解它们的媒介能力昆虫学领域数据的获取对于更好地估计疟疾风险分层和帮助改善疟疾媒介控制干预措施至关重要（c）2010 Elsevier B. V.保留所有权利。
Members of the Anopheles gambiae complex are among the best malaria vectors in the world, but their vectorial capacities vary between species and populations A large-scale sampling of An gambiae sensu law was carried out in 2006 and 2007 in various bioclimatic areas of Benin (West Africa) The objective of this study was to collate data on the relative frequencies of species and forms within the An gambiae complex and to produce a map of their spatial distribution Sampling took place at 30 sites and 2122 females were analyzed Two species were identified through molecular methods. The overall collection showed a preponderance of All gambiae s s, but unexpectedly. An arabiensis was reported in the coastal-Guinean bioclimatic area characterized by a mean annual rainfall of >1500 mm where only An gambiae s.s was reported previously. Our study of Benin indicates that An. arabiensis would be adapted not only to the urban areas but also to the rural humid regions Among 1717 An gambiae s s, 26.5% were of the M form and 73.3% were S form. Few hybrid specimens between the M and S forms were observed (0.2%) Only the spatial distribution of the M form appears to be mainly a function of bioclimatic area.Factors that influence the distribution of these malaria vectors are discussed. This study underlines the need of further investigations of biological, ecological, and behavioral traits of these species and forms to better appreciate their vectorial capacities Acquisition of entomological field data appears essential to better estimate the stratification of malaria risk and help improve malaria vector control interventions (c) 2010 Elsevier B.V. All rights reserved.