法国卡马格地区库蚊的宿主摄食偏好及其对黄病毒传播的潜在意义

IF 1.6 3区 农林科学 Q2 ENTOMOLOGY
Víctor Rodríguez-Valencia, Marie-Marie Olive, Gilbert Le Goff, Marine Faisse, Marie Bourel, Grégory L'Ambert, Benjamin Vollot, María José Tolsá-García, Christophe Paupy, David Roiz
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引用次数: 0

摘要

近几十年来,西尼罗河(WNV)和乌苏图(USUV)黄病毒在欧洲的传播突出表明,迫切需要了解这些病原体的传播网络,以此作为有效决策的基础。这些病毒是一个复杂疾病循环的一部分,该循环涉及鸟类作为主要宿主,人类和马作为死角宿主。本研究旨在揭示这些病毒的主要蚊媒库蚊(双翅目:库蚊科)与其基于几种宿主物种(主要是土地利用梯度中的鸟类)的饲料比例的摄食偏好之间的复杂关系。我们根据饲料比和分子流行率分别估计了鸟类宿主作为黄病毒宿主的潜力、水库容量指数和潜在宿主能力。我们对蚊子进行了采样,同时在法国南部卡马格地区进行了鸟类普查,在那里报告了这些病毒的共同传播。从2021年5月至11月,沿着城市周边、农业和自然地区的土地利用梯度对几个地点进行了采样。我们在110个密集的Cx中鉴定出55种脊椎动物。对线粒体12S和16S核糖体DNA基因进行PCR扩增和测序。库蚊主要以51种鸟类为食,其次以两种哺乳动物、一种两栖动物和一种爬行动物为食。根据饲粮比例,我们发现Cx的偏好。在camiiens中,更具体地说,是在农业地区的Columba livia domestica L. (Columbiformes: Columbidae),以及在农业和城郊地区的Passer domesticus/montanus L. (passiformes: Passeridae)。自然生境的牧草比值显著高于农业和城郊地区。我们认为某些关键物种,如Passer sp.、Columba livia和Turdus sp.,可能被认为是该地区传播的当地相关宿主,因为它们是蚊子取食的重要宿主,也是黄病毒扩增的潜在重要宿主。这些数据将有助于了解宿主与媒介的相互作用以及鸟类群落、蚊子摄食偏好和新出现的蚊媒疾病之间的关系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Host-feeding preferences of Culex pipiens and its potential significance for flavivirus transmission in the Camargue, France.

The spread of the West Nile (WNV) and Usutu (USUV) flaviviruses in Europe in recent decades highlights the urgent need to understand the transmission networks of these pathogens as a basis for effective decision-making. These viruses are part of a complex disease cycle that involves birds as principal hosts and humans and horses as dead-end hosts. Our study aims to uncover the intricate relationships between the main mosquito vector of these viruses, Culex pipiens L. (Diptera: Culicidae) and its feeding preferences based on the forage ratio among several host species, primarily birds in a land-use gradient. We estimated the bird host potential to act as a host for flavivirus, the reservoir capacity index, based on forage ratios and potential host competence based on molecular prevalence. We sampled mosquitoes and, at the same time, conducted bird censuses in the Camargue region in southern France, where co-circulation of these viruses has been reported. Several localities were sampled along a land-use gradient in peri-urban, agricultural and natural areas from May to November 2021. We identified 55 vertebrate species in 110 engorged Cx. pipiens by PCR amplification and sequencing of mitochondrial 12S and 16S Ribosomal DNA genes. Culex pipiens feeds primarily on 51 bird species and secondarily on two mammals, one amphibian and one reptile. Based on forage ratios, we found a preference of Cx. pipiens in the Camargue for the order Passeriformes and, more specifically, for Columba livia domestica L. (Columbiformes: Columbidae) in agricultural areas, and for Passer domesticus/montanus L. (Passeriformes: Passeridae), in agricultural and peri-urban areas. The natural habitats had significantly higher forage ratio values than agricultural and peri-urban areas. We suggest that certain key species, such as Passer sp., Columba livia and Turdus sp., might be potentially considered locally relevant hosts for transmission in this area, as they are important for mosquito feeding and also potentially important hosts for flavivirus amplification. These data will be beneficial in understanding host-vector interactions and the relationships between bird communities, mosquito feeding preferences and emerging mosquito-borne diseases.

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来源期刊
Medical and Veterinary Entomology
Medical and Veterinary Entomology 农林科学-昆虫学
CiteScore
3.70
自引率
5.30%
发文量
65
审稿时长
12-24 weeks
期刊介绍: Medical and Veterinary Entomology is the leading periodical in its field. The Journal covers the biology and control of insects, ticks, mites and other arthropods of medical and veterinary importance. The main strengths of the Journal lie in the fields of: -epidemiology and transmission of vector-borne pathogens changes in vector distribution that have impact on the pathogen transmission- arthropod behaviour and ecology- novel, field evaluated, approaches to biological and chemical control methods- host arthropod interactions. Please note that we do not consider submissions in forensic entomology.
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