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幼虫环境影响了疟疾蚊子Anopheles gambiae的载体能力

Antoine M G Barreaux^1,2, Priscille Barreaux^1,2, Kevin Thievent¹

¹Laboratory of Ecology and Epidemiology of Parasites, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, 2000 Neuchâtel, Switzerland.

MalariaWorld journal

|April 11, 2024

概括

幼虫的食物可用性显著影响蚊子传播疟疾寄生虫的传播. 影响蚊子幼虫的环境变化可以改变对疟疾传播至关重要的成年特征,影响载体能力.

科学领域:

媒介性疾病生态学媒介性疾病生态学
疟疾传播动态疟疾传播动态
环境对昆虫生理学的影响

背景情况:

温度和食物供应等环境因素可以直接和间接地影响蚊子对疟疾的载体能力.
幼虫发育是一个关键阶段,环境条件影响成年蚊子的特征,对疟疾寄生虫传播至关重要.

研究的目的:

调查幼虫食物的可用性和温度对*Anopheles gambiae*蚊子的载体能力的影响.
确定幼虫环境条件如何影响蚊子在唾液腺中藏*Plasmodium berghei*杂虫的概率.

主要方法:

在不同的温度 (21°C,25°C,29°C) 和食物水平 (标准与半).
感染成年蚊子的 *Plasmodium berghei* 和评估存活率和唾液腺体中杂虫的存在,直到21天感染后.
使用双项通用线性模型 (GLM) 来分析矢量能力.

主要成果:

减少幼虫食物的可用性使得载体能力减少了大约三分之一.
幼虫温度对载体能力的影响取决于食物的可用性.
在低食物中,将幼虫温度从21°C提高到29°C提高了载体能力 (0.18到0.48);在标准食物中,它下降了 (0.67到0.56).

结论:

影响幼虫发育的环境变化间接影响成年蚊子的特征和疟疾传播.
在环境变化下预测疟疾传播的模型应纳入幼虫阶段环境条件对成人的生命史和载体能力的影响.

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