Reduced mosquito survival in metal-roof houses may contribute to a decline in malaria transmission in sub-Saharan Africa
Reduced mosquito survival in metal-roof houses may contribute to a decline in malaria transmission in sub-Saharan Africa
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DOI：
10.1038/s41598-019-43816-0
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发表时间：
2019-05-23
影响因子：
4.6
通讯作者：
D'Alessandro, Umberto
中科院分区：
文献类型：
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作者：
Lindsay, Steve W.;Jawara, Musa;D'Alessandro, Umberto
在冈比亚，金属屋顶的房屋白天比茅草屋顶的房屋更热。24小时后，冈比亚按蚊的死亡率，非洲疟疾的主要媒介，是38%的金属屋顶的房子比茅草屋。白天，金属屋顶房屋中的蚊子从炎热的屋顶转移到靠近地板的较凉爽的地方，那里的温度仍然很高，达到35摄氏度。在实验室研究中，在35摄氏度下，很少有蚊子能存活10天，这是疟疾寄生虫发育所需的最短时间。对流行病学数据的分析表明，金属屋顶比例较高的冈比亚村庄疟疾发病率和病媒存活率较低。我们的研究结果与假设一致，即金属屋顶房屋的室内气候，温度较高，湿度较低，降低了室内休息蚊子的存活率，并可能有助于观察到撒哈拉以南非洲部分地区疟疾负担的减少。
In The Gambia, metal-roof houses were hotter during the day than thatched-roof houses. After 24 h, the mortality of Anopheles gambiae, the principal African malaria vector, was 38% higher in metal-roof houses than thatched ones. During the day, mosquitoes in metal-roof houses moved from the hot roof to cooler places near the floor, where the temperature was still high, reaching 35 degrees C. In laboratory studies, at 35 degrees C few mosquitoes survived 10 days, the minimum period required for malaria parasite development. Analysis of epidemiological data showed there was less malaria and lower vector survival rates in Gambian villages with a higher proportion of metal roofs. Our findings are consistent with the hypothesis that the indoor climate of metal-roof houses, with higher temperatures and lower humidity, reduces survivorship of indoor-resting mosquitoes and may have contributed to the observed reduction in malaria burden in parts of sub-Saharan Africa.