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首页> 外文期刊>The American Journal of Tropical Medicine and Hygiene >Risk factors associated with human infection during the 2006 West Nile virus outbreak in Davis, a residential community in northern California.
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Risk factors associated with human infection during the 2006 West Nile virus outbreak in Davis, a residential community in northern California.

机译：加利福尼亚北部居民区戴维斯（Davis）在2006年发生西尼罗河病毒爆发期间与人类感染相关的危险因素。

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摘要

We collected a total of 15,329 mosquitoes during weekly sampling in Davis, CA, from April through mid-October 2006 at 21 trap sites uniformly spaced 1.5 km apart over an area of approximately 26 km(2). Of these mosquitoes, 1,355 pools of Culex spp. were tested by multiplex reverse transcriptase-polymerase chain reaction, of which 16 pools (1.2%) were positive for West Nile virus (WNV). A degree-day model with a developmental threshold of 14.3 degrees C accurately predicted episodic WNV transmission after three extrinsic incubation periods after initial detection. Kriging interpolation delineated that Culex tarsalis were most abundant at traps near surrounding agriculture, whereas Cx. pipiens clustered within residential areas and greenbelt systems in the old portion of Davis. Spatial-temporal analyses were performed to test for clustering of locations of WNV-infected dead birds and traps with WNV-positive Cx. tarsalis and Cx. pipiens; human case incidence was mapped by census blocks. Significant multivariate spatial-temporal clustering was detected among WNV-infected dead birds and WNV-positive Cx. tarsalis, and a WNV-positive Cx. pipiens cluster overlapped areas with high incidences of confirmed human cases. Spatial analyses of WNV surveillance data may be an effective method to identify areas with an increased risk for human infection and to target control efforts to reduce the incidence of human disease.
机译：从2006年4月到2006年10月中旬，我们在加利福尼亚州戴维斯进行了每周采样，总共收集了15329只蚊子，分布在约26 km（2）上均匀间隔1.5 km的21个捕集点。在这些蚊子中，有1,355个库蚊库蚊。通过多重逆转录酶-聚合酶链反应检测了其中的16个库（1.2％）对西尼罗河病毒（WNV）呈阳性。发育阈值为14.3°C的度日模型在初步检测后的三个外在潜伏期后可准确预测突发性WNV传播。克里格插值法表明，库莱克斯（Culex tarsalis）在周围农业附近的圈闭处最丰富，而Cx则最多。 pipiens聚集在戴维斯老城区的居民区和绿地系统中。进行时空分析以测试WNV阳性Cx感染WNV的死鸟和陷阱的位置聚集。 s和Cx。 pipiens;人类病例的发病率按人口普查区划。在WNV感染的死鸟和WNV阳性Cx中检测到显着的多元时空聚类。 tar和WNV阳性Cx。 pipiens簇重叠区域，确诊病例高发。 WNV监测数据的空间分析可能是一种有效的方法，可以识别出人类感染风险增加的区域，并以控制为目标以减少人类疾病的发生。

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