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首页> 外文期刊>The American Journal of Tropical Medicine and Hygiene >Dry season refugia of malaria-transmitting mosquitoes in a dry savannah zone of east Africa.
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Dry season refugia of malaria-transmitting mosquitoes in a dry savannah zone of east Africa.

机译：东非干旱大草原地区传播疟疾的蚊子的旱季避难所。

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摘要

Dry season survival of Anopheles funestus, Anopheles gambiae and Anopheles arabiensis in the Kilombero valley a dry savannah zone of east Africa, was investigated with over 400 collections from 23 areas, covering 300 sq km of the valley. Anopheles gambiae was found only in association with humans, in forested areas of high annual rainfall, while An. funestus occurred at high densities at the valley edge where large non-moving bodies of water remained. A large population of An. arabiensis was present along the river system throughout the middle of the valley, and mosquitoes probably derived from this population were occasionally caught in villages bordering the valley. No evidence was obtained of aestivation in any mosquito species. Anopheles gambiae was the most long lived, 6.3% compared to 2.0% of the An. arabiensis and 4% of the An. funestus surviving for four or more gonotrophic cycles, the approximate duration of the extrinsic cycle of most malaria parasites. Oocysts of malaria parasites were found in 5.4% of An. funestus and 2.3% of An. arabiensis from villages. Oocyst rates in An. funestus differed significantly between areas but not between houses within areas. Anopheles funestus is the most important dry season malaria vector in the valley, and remains in foci closely associated with groups of houses. All three species survive at high densities but as otherwise hidden refugia populations.
机译：在东非干旱大草原地区的Kilombero谷中调查了真菌按蚊，冈比亚按蚊和阿拉伯按蚊的干旱季节生存情况，调查了23个地区的400多个物种，覆盖了300平方公里的山谷。冈比亚按蚊仅与人类有关，在年降水量高的森林地区，而An。真菌病以高密度发生在山谷边缘，那里仍然有大量不动的水体。人口众多。整个山谷中部的河流系统中都存在着阿拉伯树，有时可能是由该种群衍生的蚊子在山谷附近的村庄中被捕。在任何蚊子中均未获得任何引诱的证据。冈比亚按蚊寿命最长，为6.3％，而按蚊为2.0％。阿拉伯和4％的An。真菌存活四个或四个以上的非营养周期，即大多数疟原虫外在周期的大致持续时间。在5.4％的An中发现了疟原虫的卵囊。 Funestus和An的2.3％来自村庄的阿拉伯安氏卵囊率不同区域之间的funestus有显着差异，但区域内的房屋之间没有显着差异。真菌按蚊是山谷中最重要的旱季疟疾传播媒介，仍然存在于与房屋群密切相关的病灶中。这三个物种都以高密度生存，但以其他方式隐藏于避难所种群中。

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