Increased temperatures reduce the vectorial capacity of Aedes mosquitoes for Zika virus
Increased temperatures reduce the vectorial capacity of Aedes mosquitoes for Zika virus
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DOI：
10.1080/22221751.2019.1707125
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发表时间：
2020-01-01
影响因子：
13.2
通讯作者：
Kramer, Laura D.
中科院分区：
文献类型：
--
作者：
Onyango, Maria Gorreti;Bialosuknia, Sean M.;Kramer, Laura D.
寨卡病毒（ZIKV）及其伊蚊媒介物种的快速和显著范围扩张已导致ZIKV被宣布为全球健康威胁。预计全球平均气温将上升，可能导致蚊媒病原体传播潜力的改变。了解温度日较差对Ae介导能力的影响。aegypti和Ae.在饲喂感染性血粉后，在两种温度方案下评估白纹伊蚊的ZIKV、寿命、吸血和载体能力。温度升高导致Ae寿命缩短。埃及伊蚊吸血率降低[Log-rank检验，χ 2，df 35.66，5，P < 0.001]。白纹症[Fisher精确检验，P < 0.001]。温度对ZIKV感染率具有群体和物种特异性影响。总的来说，E。在最低温度条件下饲养的白纹伊蚊表现出最高的媒介容量（0.53）和最高的传播效率（57%）。温度升高降低了各组的向量容量，但用Ae测量了更显着的影响。埃及相对于Ae.白纹伊蚊这项研究的结果表明，美洲未来气温的升高可能会显著影响病媒能力、吸血和寿命，并可能降低美洲伊蚊的整体病媒能力。
Rapid and significant range expansion of both Zika virus (ZIKV) and its Aedes vector species has resulted in ZIKV being declared a global health threat. Mean temperatures are projected to increase globally, likely resulting in alterations of the transmission potential of mosquito-borne pathogens. To understand the effect of diurnal temperature range on the vectorial capacity of Ae. aegypti and Ae. albopictus for ZIKV, longevity, blood-feeding and vector competence were assessed at two temperature regimes following feeding on infectious blood meals. Higher temperatures resulted in decreased longevity of Ae. aegypti [Log-rank test, chi 2, df 35.66, 5, P < 0.001] and a decrease in blood-feeding rates of Ae. albopictus [Fisher's exact test, P < 0.001]. Temperature had a population and species-specific impact on ZIKV infection rates. Overall, Ae. albopictus reared at the lowest temperature regime demonstrated the highest vectorial capacity (0.53) and the highest transmission efficiency (57%). Increased temperature decreased vectorial capacity across groups yet more significant effects were measured with Ae. aegypti relative to Ae. albopictus. The results of this study suggest that future increases in temperature in the Americas could significantly impact vector competence, blood-feeding and longevity, and potentially decrease the overall vectorial capacity of Aedes mosquitoes in the Americas.