Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th St., Rosenfield Bldg., 1104C, New York, NY 10032, USA.
J Med Entomol. 2011 Jul;48(4):867-75. doi: 10.1603/me10269.
The factors determining the spatial and temporal distribution of West Nile virus (family Flaviviridae, genus Flavivirus, WNV) activity are not well understood. Here, we explore the effects of hydrological and meteorological conditions on WNV infection among Culex genus mosquitoes collected during 2001-2009 in Suffolk County, Long Island, NY. We show that WNV infection rates in assayed pools of Culex mosquitoes are associated in both space and time with hydrological and meteorological variability. Specifically, wet winter, warm and wet spring conditions, and dry summer conditions are associated with the increased local prevalence of WNV among Culex mosquitoes during summer and fall. These findings indicate that within Suffolk County, and for a given year, areas at risk for heightened WNV activity may be identified in advance by using hydrology model estimates of land surface wetness and observed meteorological conditions.
西尼罗河病毒（黄病毒科，黄病毒属，WNV）的时空分布决定因素尚不清楚。本研究探索了 2001-2009 年在纽约长岛萨福克县收集的库蚊属蚊虫中，水文气象条件对西尼罗河病毒感染的影响。结果表明，在检测的库蚊蚊池中，西尼罗河病毒感染率与水文气象变异性在空间和时间上均相关。具体而言，冬季湿润、春季温暖湿润和夏季干旱条件与夏秋季库蚊中西尼罗河病毒地方性流行率增加有关。这些发现表明，在萨福克县内，对于特定年份，可以通过使用陆地表面湿润度的水文模型估计值和观测到的气象条件来提前确定西尼罗河病毒活动加剧的风险区域。
