幼虫接触亚致死杀虫剂会影响成蚊的吸血行为。

IF 3 2区 医学 Q1 PARASITOLOGY
Tiago G Zeferino, Gwendoline Acerbi, Jacob C Koella
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引用次数: 0

摘要

背景:由于广泛用于控制病媒和农业害虫,杀虫剂在环境中无处不在,包括在孳生蚊子幼虫的水体中。因此,这些幼虫持续暴露在亚致死剂量下。由于这对蚊子的生理和生活史具有长期影响,我们预计它也可能影响蚊子种群动态和疾病流行病学的行为,如产卵偏好、吸血动机和寻找宿主行为。方法:利用冈比亚按蚊(一种重要的疟疾媒介)对杀虫剂敏感和耐药菌株,我们评估了在幼虫发育过程中亚致死暴露于氯菊酯对成虫对杀虫剂的抗性、寻找宿主行为、吸血动机和产卵行为的影响。结果:暴露于亚致死剂量的杀虫剂对击倒率和死亡率没有影响。然而,它减少了对氯菊酯处理过的蚊帐的回避,并增加了雌性通过氯菊酯处理过的蚊帐寻找血餐的动机,而不管它们对杀虫剂的敏感性如何。它还增加了血粉的大小,尤其是敏感的蚊子。最后,受辐射的雌性比未受辐射的雌性更有可能在几个地方产卵。结论:在幼虫发育期间接触亚致死杀虫剂会改变蚊子行为的几个方面,从而可能增强疾病传播,从而可能具有重要的流行病学意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sublethal insecticide exposure of larvae affects the blood-feeding behaviour of adult mosquitoes.

Background: Due to their widespread use for controlling disease vectors and agricultural pests, insecticides have become ubiquitous in the environment, including in water bodies harbouring mosquito larvae. As a result, these larvae are continuously exposed to sublethal doses. Since this has long-lasting effects on the mosquitoes' physiology and life-history, we expected that it may also affect behaviours that underlie the mosquitoes' population dynamics and disease epidemiology, such as egg-laying preference, blood-feeding motivation and host-seeking behaviour.

Methods: Using an insecticide-sensitive and a resistant strain of Anopheles gambiae, an important malaria vector, we evaluated the effects of sublethal exposure to permethrin throughout larval development on the resistance to the insecticide in adults, on host-seeking behaviour, on the motivation to blood-feed and on egg-laying behaviour.

Results: Exposure to sublethal doses of insecticide did not affect knock-down or mortality rates. However, it decreased the avoidance of permethrin-treated nets, and it increased the motivation of females to seek blood meals through permethrin-treated nets, regardless of their sensitivity to the insecticide. It also increased the blood-meal size in particular of the sensitive mosquitoes. Finally, exposed females were more likely than unexposed ones to lay their eggs into several sites.

Conclusions: Sublethal insecticide exposure during larval development changes several aspects of the behaviour of mosquitoes in ways that could enhance disease transmission and may thus have significant epidemiological implications.

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来源期刊
Parasites & Vectors
Parasites & Vectors 医学-寄生虫学
CiteScore
6.30
自引率
9.40%
发文量
433
审稿时长
1.4 months
期刊介绍: Parasites & Vectors is an open access, peer-reviewed online journal dealing with the biology of parasites, parasitic diseases, intermediate hosts, vectors and vector-borne pathogens. Manuscripts published in this journal will be available to all worldwide, with no barriers to access, immediately following acceptance. However, authors retain the copyright of their material and may use it, or distribute it, as they wish. Manuscripts on all aspects of the basic and applied biology of parasites, intermediate hosts, vectors and vector-borne pathogens will be considered. In addition to the traditional and well-established areas of science in these fields, we also aim to provide a vehicle for publication of the rapidly developing resources and technology in parasite, intermediate host and vector genomics and their impacts on biological research. We are able to publish large datasets and extensive results, frequently associated with genomic and post-genomic technologies, which are not readily accommodated in traditional journals. Manuscripts addressing broader issues, for example economics, social sciences and global climate change in relation to parasites, vectors and disease control, are also welcomed.
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