Seasonal Blood-Feeding Behavior of Culex tarsalis (Diptera: Culicidae) in Weld County, Colorado, 2007
Seasonal Blood-Feeding Behavior of Culex tarsalis (Diptera: Culicidae) in Weld County, Colorado, 2007
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DOI：
10.1603/033.046.0226
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发表时间：
2009-03-01
影响因子：
2.1
通讯作者：
Komar, Nicholas
中科院分区：
文献类型：
--
作者：
Kent, Rebekah;Juliusson, Lara;Komar, Nicholas
对科罗拉多的跗库蚊的研究表明，鸟类和哺乳动物的血餐比例存在明显的季节性变化。然而，在沉淀素试验中使用的抗体的特异性和缺乏脊椎动物宿主可用性数据的限制，值得重新审视Cx。在西尼罗河病毒（WNV）传播的背景下，跗跖吸血行为。我们的特点的主机偏好的Cx。在西尼罗河病毒传播的高峰季节在东部科罗拉多tarsalis，并估计不同鸟类物种的相对贡献，西尼罗河病毒传播。库蚊虽然在7月和8月，来自哺乳动物的血餐比例有所增加，但每个月tarsalis都喜欢鸟类而不是哺乳动物。血餐的分布在几个月内有很大的不同，部分原因是来自美国知更鸟的血餐比例的变化，美国知更鸟是一个首选的宿主。从6月到8月，来自美国知更鸟的WNV感染性媒介的估计比例从60%下降到1%。大多数禽血餐来自鸽子，鸽子是每月贡献25-40%的WNV感染性蚊子的首选宿主。活跃的西尼罗河病毒传播与一个大的家麻雀公共栖息地。这些数据显示了Cx的季节性模式。tarsalis吸血行为与西尼罗河病毒在东科罗拉多的传播有关，美国知更鸟对季节早期的病毒传播有很大贡献，麻雀的公共栖息地是季节后期扩增的焦点。
Studies on Culex tarsalis Coquillett in Colorado have shown marked seasonal variation in the proportion of blood meals from birds and mammals. However, limitations in the specificity of antibodies used in the precipitin test and lack of vertebrate host availability data warrant revisiting Cx. tarsalis blood feeding behavior in the context of West Nile virus (WNV) transmission. We characterized the host preference of Cx. tarsalis during peak WNV transmission season in eastern Colorado and estimated the relative contribution of different avian species to WNV transmission. Cx. tarsalis preferred birds to mammals each month, although the proportion of blood meals from mammals increased in July and August. The distribution of blood meals differed significantly across months, in part because of changes in the proportion of blood meals from American robins, a preferred host. The estimated proportion of WNV-infectious vectors derived from American robins declined from 60 to 1% between June and August. The majority of avian blood meals came from doves, preferred hosts that contributed 25-40% of the WNV-infectious mosquitoes each month. Active WNV transmission was observed in association with a large house sparrow communal roost. These data show how seasonal patterns in Cx. tarsalis blood feeding behavior relate to WNV transmission in eastern Colorado, with the American robin contributing greatly to early-season virus transmission and a communal roost of sparrows serving as a focus for late-season amplification.