Ross W A, Kaneene J B
Population Medicine Center, College of Veterinary Medicine, Michigan State University, East Lansing 48824-1314, USA.
J Am Vet Med Assoc. 1996 Jun 15;208(12):1988-97.
To evaluate outbreaks of disease attributable to eastern equine encephalitis virus (EEEV) in horses in Michigan, and the associated environmental patterns and weather conditions, so that factors could be identified that may have predisposed horses in specific areas of the state to infections with EEEV.
Epidemiologic retrospective records analysis.
Data on EEEV vectors, wild-bird reservoir hosts, and incidental hosts, including horses and human beings, obtained from census reports and medical records compiled between 1942 and 1991.
Patterns detected during outbreaks of disease attributable to EEEV infections in horses were compared to associated water drainage patterns, distributions of EEEV vectors, wild-bird reservoir and incidental hosts, and weather conditions.
Michigan has all of the elements required to sustain EEEV on a state-wide basis. Outbreaks of disease attributable to EEEV in horses have recurred in a similar regional distribution in Michigan. Regions of Michigan that have specific patterns for water drainage, specific mosquito species, and areas with higher than expected amounts of precipitation have been associated with outbreaks of disease attributable to EEEV in horses.
Evaluation of environmental patterns, weather conditions, and vector and reservoir host distributions may be useful to identify areas in Michigan and elsewhere in which horses and human beings are at increased risk for an outbreak of disease attributable to EEEV.
评估密歇根州马匹中由东部马脑炎病毒（EEEV）引起的疾病暴发情况，以及相关的环境模式和天气条件，以便确定该州特定地区的马匹可能易感染EEEV的因素。
流行病学回顾性记录分析。
从1942年至1991年汇编的人口普查报告和医疗记录中获取有关EEEV媒介、野生鸟类储存宿主以及包括马匹和人类在内的偶然宿主的数据。
将马匹中由EEEV感染引起的疾病暴发期间检测到的模式与相关的排水模式、EEEV媒介分布、野生鸟类储存宿主和偶然宿主以及天气条件进行比较。
密歇根州具备在全州范围内维持EEEV传播的所有要素。密歇根州马匹中由EEEV引起的疾病暴发在类似的区域分布中反复出现。密歇根州具有特定排水模式、特定蚊种以及降水量高于预期的地区与马匹中由EEEV引起的疾病暴发有关。
评估环境模式、天气条件以及媒介和储存宿主分布可能有助于确定密歇根州及其他地区马匹和人类因EEEV而暴发疾病风险增加的区域。
