MIVEGEC Laboratory, IRD-CNRS-Montpellier Univ., Montpellier, 34394, France.
Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ, 21040-900, Brazil.
Emerg Microbes Infect. 2018 Nov 28;7(1):191. doi: 10.1038/s41426-018-0194-y.
The invasive species Aedes albopictus is present in 60% of Brazilian municipalities, including at the interfaces between urban settings and forests that are zoonotic arbovirus hotspots. We investigated Ae. albopictus colonization, adult dispersal and host feeding patterns in the anthropic-natural interface of three forested sites covering three biomes in Brazil in 2016. To evaluate whether an ecological overlap exists between Ae. albopictus and sylvatic yellow fever virus (YFV) in forests, we performed similar investigations in seven additional urban-forest interfaces where YFV circulated in 2017. We found Ae. albopictus in all forested sites. We detected eggs and adults up to 300 and 500 m into the forest, respectively, demonstrating that Ae. albopictus forest colonization and dispersal decrease with distance from the forest edge. Analysis of the host identity in blood-engorged females indicated that they fed mainly on humans and domestic mammals, suggesting rare contact with wildlife at the forest edge. Our results show that Ae. albopictus frequency declines as it penetrates into the forest and highlight its potential role as a bridge vector of zoonotic diseases at the edge of the Brazilian forests studied.
入侵物种白纹伊蚊存在于巴西 60%的城市，包括城市环境与森林的交界处，这些地区是动物源性虫媒病毒的热点。我们于 2016 年在巴西三个森林地区的人为-自然界面进行了研究，以调查白纹伊蚊的定殖、成虫扩散和宿主取食模式。为了评估白纹伊蚊与森林中的野生型黄热病病毒（YFV）之间是否存在生态重叠，我们于 2017 年在另外七个 YFV 传播的城市-森林交界处进行了类似的调查。我们在所有森林地区都发现了白纹伊蚊。我们分别在距离森林边缘 300 米和 500 米处检测到了卵和成虫，这表明白纹伊蚊向森林的定殖和扩散随着与森林边缘距离的增加而减少。对吸血后雌性体内的宿主身份进行分析表明，它们主要以人类和家养哺乳动物为食，这表明它们在森林边缘与野生动物的接触很少。我们的结果表明，白纹伊蚊的频率随着其进入森林而下降，并强调了它在巴西研究森林边缘作为动物源性疾病桥梁媒介的潜在作用。
