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首页> 外文期刊>Journal of Medical Entomology >Regional Comparison of Mosquito Bloodmeals in South Australia: Implications for Ross River Virus Ecology
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Regional Comparison of Mosquito Bloodmeals in South Australia: Implications for Ross River Virus Ecology

机译：南澳大利亚蚊子血粉的区域比较：对罗斯河病毒生态学的启示

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Ross River virus (RRV) is responsible for the most notifications of human arboviral infection in Australia. Seroprevalence and experimental infection studies have implicated macropods (e.g., kangaroos) as the major reservoir hosts. However, transmission ecology varies spatially, and infections in urban areas have prompted the question of what animals serve as reservoirs in regions where macropods are scarce. In South Australia (SA), human infection rates for RRV vary greatly by region as do vector and reservoir abundance. We hypothesized that mosquito abundance and feeding patterns would vary among ecoregions of SA and could help explain divergent human case rates. To test our hypothesis, we amplified and sequenced a 457 base pair region of the cytochrome B segment of mitochondrial DNA from blood fed mosquitoes collected in three main ecoregions of SA and identified sequences using a BLAST search in NCBI. Domestic livestock made up the vast majority of bloodmeals from the region with the highest human infection rate. Livestock are generally not considered to be important reservoir hosts for RRV, but our results suggest they may have a role in transmission ecology in some places. Surprisingly, none of the 199 bloodmeal samples were identified as macropod in origin. In the context of these findings, we consider the possible RRV vectors and reservoir hosts in these regions and propose that diverse spatial and temporal transmission ecologies occur in SA, depending on vector and reservoir availability.
机译：罗斯河病毒（RRV）是澳大利亚人间虫媒病毒感染的大部分通报。血清阳性率和实验性感染研究表明巨脚类（例如袋鼠）是主要的宿主。然而，传播生态在空间上是不同的，城市地区的感染已经引发了一个问题，即在大脚怪稀缺的地区，什么动物充当水库。在南澳大利亚州（SA），RRV的人类感染率随地区和媒介和水库丰度的变化也很大。我们假设在南非的生态区域之间蚊子的丰度和摄食方式会有所不同，并且可以帮助解释不同的人类病例发生率。为了检验我们的假设，我们从SA的三个主要生态区收集的采血蚊子中扩增并测序了线粒体DNA的细胞色素B片段的457个碱基对区域，并在NCBI中使用BLAST搜索对序列进行了鉴定。家畜构成了该地区人类感染率最高的血粉中的绝大部分。通常不认为牲畜是RRV的重要储藏宿主，但我们的研究结果表明，牲畜可能在某些地方对传播生态起一定作用。令人惊讶的是，这199个血粉样品中没有一个被鉴定为起源于大脚豆。在这些发现的背景下，我们考虑了这些区域中可能存在的RRV媒介和储层宿主，并提出了取决于媒介和储层可用性的南澳地区多样的时空传播生态。

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