Influence of host and larval habitat distribution on the abundance of African malaria vectors in western Kenya
Influence of host and larval habitat distribution on the abundance of African malaria vectors in western Kenya
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DOI：
10.4269/ajtmh.2002.67.32
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发表时间：
2002-07-01
影响因子：
3.3
通讯作者：
Yan, GY
中科院分区：
文献类型：
--
作者：
Minakawa, N;Seda, P;Yan, GY
同一村庄内不同房屋的按蚊数量差异很大。严格意义上的冈比亚按蚊是高度嗜中性的，而阿拉伯按蚊是嗜动物的;因此，人们经常假设，An. gambiae和An.房子里的阿拉伯人与牲畜和人的分布有关。在本文中，我们研究了牲畜和人类宿主的可用性的分布和丰富的疟疾病媒在肯尼亚西部的维多利亚湖流域地区的影响。安的幼虫和成虫。gambiae、冈比亚角隐翅虫An.在1999年雨季开始和结束时采集阿拉伯按蚊和不吉按蚊。冈比亚按蚊在幼虫和成虫样品中均为优势种。多元回归分析发现，房屋与幼虫栖息地之间的距离与牛棚与幼虫栖息地之间的距离的比值与An的相对丰度呈显著负相关。两个采样期的冈比亚幼虫。人牛密度比与按蚊相对丰度呈正相关。雨季后期的冈比亚幼虫。对于成年样本，从房子到最近的幼虫栖息地的距离是唯一的变量，显示出显着的相关性与安。在两个抽样期内冈比亚的住房密度。在距离幼虫栖息地300米以内的房屋中发现了90%以上的按蚊成虫。按蚊密度与牛或人的密度或牛舍与房屋的距离无关。这些结果表明，牲畜和人类宿主的可用性影响相对丰度的安。冈比亚幼虫在水生生境中的分布，但按蚊成虫在房屋中的分布取决于房屋与幼虫生境的距离。
The abundance of anopheline mosquitoes varies substantially among houses within the same villages. Anopheles gambiae sensu stricto is highly anthropophilic, and Anopheles arabiensis is zoophilic; thus, it is often hypothesized that the abundance of An. gambiae and An. arabiensis in a house is associated with the distribution of livestock and humans. In this paper we examined the influence of livestock and human host availability on the distribution and abundance of malaria vectors in the basin region of Lake Victoria in western Kenya. Larvae and adults of An. gambiae, An. arabiensis and Anopheles funestus were collected in the beginning and the end of the rainy season in 1999. Anopheles gambiae was the predominant species in both larval and adult samples. Multiple regression analyses found that the ratio of distance between houses and larval habitats to distance between cowsheds and larval habitats had a significant and negative association with the relative abundance of An. gambiae larvae for both sampling periods. The ratio of human density to cow density was positively correlated with the relative abundance of An. gambiae larvae in the late rainy period. For the adult samples, distance from a house to its nearest larval habitats was the only variable that showed a significant correlation with the An. gambiae density in houses in both sample periods. More than 90% of anopheline adults were found in the houses within 300 meters from the nearest larval habitats. Anopheline mosquito density was not correlated to the density of cows or humans, or the distance to cowsheds from houses. These results suggest that livestock and human host availability affect the relative abundance of An. gambiae larvae in aquatic habitats, but the distribution of anopheline adults in houses is determined by the distance from houses to larval habitats.