The impact of host species and vector control measures on the fitness of African malaria vectors.
The impact of host species and vector control measures on the fitness of African malaria vectors.
复制标题
宿主物种和病媒控制措施对非洲疟疾病媒适应性的影响。
DOI：
10.1098/rspb.2012.2823
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Lyimo IN
中科院分区：
文献类型：
--
作者：
Lyimo IN
Many malaria vector mosquitoes in Africa have an extreme preference for feeding on humans. This specialization allows them to sustain much higher levels of transmission than elsewhere, but there is little understanding of the evolutionary forces that drive this behaviour. In Tanzania, we used a semi-field system to test whether the well-documented preferences of the vectors,Anopheles arabiensisandAnopheles gambiaesensu stricto(s.s.) for cattle and humans, respectively, are predicted by the fitness they obtain from host-seeking on these species relative to other available hosts. Mosquito fitness was contrasted, when humans were fully exposed and when they were protected by a typical bednet. The fitness of both vectors varied between host species. The predicted relationship between host preference and fitness was confirmed inAn. arabiensis, but not inAn. gambiaes.s., whose fitness was similar on humans and other mammals. Use of typical, imperfect bednets generated only minor reductions inAn. gambiaes.s. feeding success and fitness on humans, but was predicted to generate a significant reduction in the lifetime reproductive success ofAn. arabiensison humans relative to cows. This supports the hypothesis that such human-protective measures could additionally benefit malaria control by increasing selection for zoophily in vectors.
