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首页> 外文学位 >Bloodfeeding Patterns of Culex tarsalis and the Culex pipiens complex in California.
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Bloodfeeding Patterns of Culex tarsalis and the Culex pipiens complex in California.

机译：加利福尼亚库蚊和库蚊的血液喂养模式。

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摘要

Culex tarsalis and members of the Culex pipiens complex are the primary vectors of West Nile virus (WNV) in California. Since both Culex species feed on a variety of avian hosts, with varying WNV competence, as well as disease-susceptible mammals, such as horses and humans, determining the bloodfeeding patterns of these mosquitoes may be critical in understanding the transmission dynamics of WNV throughout the state. A novel bloodmeal identification assay was developed based on the LuminexRTM microsphere platform. The assay utilized the barcoding region of the mitochondrial gene cytochrome c oxidase I (COI) and species-specific capture probes to identify 15 common vertebrate hosts. In combination with DNA sequencing, the assay identified the avian, mammalian and reptilian hosts of over 2500 Culex mosquitoes. Sampling bias was explored among collection methods. There was no difference in the hosts of Culex collected in gravid traps and resting locations, whereas partial fed females collected from CO2 traps differed significantly from both gravid trap and resting collections and may be biased toward more defensive hosts. Seasonal changes in bloodfeeding were investigated at a rural farmstead and heronry. When present during nesting, herons and egrets were the most frequent hosts, but Cx. tarsalis demonstrated a shift to more mammalian bloodfeeding during late summer and fall. This shift also corresponded to feeding on a greater diversity of avian hosts and was associated with changes in host availability and increased mosquito abundance. Spatial differences in Culex bloodfeeding were explored throughout California, and nearly 100 different vertebrate host species were identified. Variation in bloodfeeding patterns primarily resulted from differences in host availability and abundance. Several species, including House Sparrow, House Finch, Mourning Dove, and Domestic Dog, were frequent hosts throughout the state, and highly competent corvids, Western Scrub-Jay, Yellow-billed Magpie, and American Crow, were fed upon more frequently than in previous studies. WNV-competent avian hosts were fed upon in each study area and throughout the seasons. By feeding on competent hosts and humans, Cx. tarsalis and the Cx. pipiens complex could serve as both enzootic and epidemic vectors of WNV in California.
机译：齿形库蚊和淡色库蚊的成员是加利福尼亚州西尼罗河病毒（WNV）的主要载体。由于两种库蚊都以具有不同WNV能力的各种禽类宿主以及易患疾病的哺乳动物（例如马和人类）为食，因此确定这些蚊子的采血方式对于了解WNV在整个动物体内的传播动态可能至关重要。州。基于LuminexRTM微球平台开发了一种新颖的血粉鉴定测定法。该测定利用线粒体基因细胞色素C氧化酶I（COI）的条形码区域和物种特异性捕获探针来识别15种常见脊椎动物宿主。结合DNA测序，该检测方法鉴定出2500多种库蚊（Culex）蚊子的禽类，哺乳动物和爬行动物宿主。在收集方法中探讨了抽样偏差。在妊娠诱捕器和静止位置收集的库蚊宿主没有差异，而从二氧化碳诱捕器收集的部分摄食雌性与妊娠诱捕器和静止收集器有显着差异，并且可能偏向防御性更强的宿主。在一个农村农庄和苍鹭中调查了血液喂养的季节性变化。当在筑巢期间出现时，鹭和白鹭是最常见的寄主，但Cx最多。 summer在夏末和秋季表现出向更多哺乳动物供血的转变。这种转变还对应于以更多种类的鸟类寄主为食，并且与寄主可用性的变化和蚊虫丰度的增加有关。在整个加利福尼亚州，研究了库克斯（Culex）取血的空间差异，并确定了近100种不同的脊椎动物寄主物种。采血方式的变化主要是由于宿主利用率和丰度的差异所致。在整个州，经常有许多物种，包括麻雀，雀科，雀科和哀犬，以及家养狗，而高能犬，西灌木丛杰伊，黄嘴喜Mag和美洲乌鸦的觅食频率要比西伯利亚高。之前的学习。在每个研究区域和整个季节都喂食具有WNV能力的禽类寄主。通过以能胜任的宿主和人类为食，Cx。 s和Cx。 pipiens复合体可作为加利福尼亚WNV的流行媒介和流行媒介。

著录项

  • 作者

    Thiemann, Tara Coleen.;

  • 作者单位

    University of California, Davis.;

  • 授予单位 University of California, Davis.;
  • 学科 Entomology.
  • 学位 Ph.D.
  • 年度 2011
  • 页码 119 p.
  • 总页数 119
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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