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首页> 外文期刊>Journal of vector ecology: journal of the Society for Vector Ecology >Blood meal analysis, flavivirus screening, and influence of meteorological variables on the dynamics of potential mosquito vectors of West Nile virus in northern Italy
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Blood meal analysis, flavivirus screening, and influence of meteorological variables on the dynamics of potential mosquito vectors of West Nile virus in northern Italy

机译：血粉分析，黄病毒筛选以及气象变量对意大利北部西尼罗河病毒潜在蚊媒动态的影响

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An extended area of northern Italy has experienced several West Nile virus (WNV) outbreaks and the emergence of Usutu virus (USUV) during previous years. Our aim was to study some of the factors that could explain disease patterns in the Trentino region, where circulation was detected in human sera and sentinel chickens, but no human or equine cases were reported. We collected Culex species (Diptera: Culicidae) in peridomestic environments. The collected specimens were analyzed for feeding behavior, the influence of temperature and rainfall on the abundance of mosquitoes, and the occurrence of flaviruses. Analysis of blood meals showed that Culex pipiens fed mainly on blackbirds (Turdus merula) and house sparrows (Passer domesticus), while Culex hortensis fed strictly on lizards. The abundance of Cx. pipiens females correlated positively with mean temperature and negatively with rainfall (one to four weeks before capture). This negative relationship could be due to the direct effect of the flushing of habitats together with an indirect effect of oviposition repellency. The mean weekly temperature influenced the abundance of Cx. hortensis. No flaviviruses were detected in the analyzed Culex mosquitoes. These data suggest a silent cycle at low enzootic transmission levels in the area. Furthermore, we present the first contribution to understanding the transmission role of Cx. pipiens mosquitoes in Italy by identifying vertebrate hosts to species level.
机译：在过去的几年中，意大利北部的一个扩展地区经历了几次西尼罗河病毒（WNV）的爆发和Usutu病毒（USUV）的出现。我们的目的是研究一些可以解释特伦蒂诺地区疾病模式的因素，特伦蒂诺地区的人血清和前哨鸡中发现有血液循环，但未报告人或马病例。我们在围产环境中收集了库蚊种（双翅目：库蚊科）。分析收集的标本的进食行为，温度和降雨对蚊子数量的影响以及黄病毒的发生。对血粉的分析表明，淡色库蚊主要以黑鸟（Turdus merula）和麻雀（Passer domesticus）为食，而库勒山楂仅以蜥蜴为食。 Cx的丰富度。 pipiens雌性与平均温度呈正相关，与降雨呈负相关（捕获前一到四周）。这种负面关系可能是由于栖息地泛滥的直接影响以及驱卵的间接影响。每周平均温度影响Cx的丰度。霍特树。在分析的库蚊中未检测到黄病毒。这些数据表明该地区的低虫害传播水平处于无声周期。此外，我们提出了了解Cx的传输作用的第一个贡献。通过识别脊椎动物寄主到物种水平来实现意大利的pipiens蚊子。

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