H3N2型猪流感疫情的空间流行病学
Spatial epidemiology of an H3N2 swine influenza outbreak.
作者信息
Pasma Tim
机构信息
Zoonotic Disease Regulatory Programs, CVO/Food Safety Knowledge Centre, 545 University Crescent, Winnipeg, Manitoba R3T 5S6.
出版信息
Can Vet J. 2008 Feb;49(2):167-76.
The H3N2 swine influenza virus appeared for the 1st time in the province of Manitoba during the fall of 2004. The purpose of this study was to characterize how swine influenza moved through the province in time and space, and to determine if there are any significant patterns associated with this movement. Herds with outbreaks of H3N2 swine influenza were located by using a Geographic Information System and analyzed by using spatial analysis software. Descriptive and spatial statistics, including the Nearest Neighbor Index, Cuzick and Edwards' test, Spatial Scan statistic, k Nearest Neighbor test, Knox's test, and Mantel's test, were used to analyze the outbreak. There was clustering of the outbreak in the region surrounding Steinbach, Manitoba, an area that is densely populated with swine. It is hypothesized that density of swine farms was a factor in the clustering and movement of this swine influenza outbreak.
H3N2猪流感病毒于2004年秋季首次在曼尼托巴省出现。本研究的目的是描述猪流感在该省的时空传播方式，并确定这种传播是否存在任何显著模式。通过使用地理信息系统定位出现H3N2猪流感疫情的猪群，并使用空间分析软件进行分析。采用描述性和空间统计方法，包括最近邻指数、库齐克和爱德华兹检验、空间扫描统计、k最近邻检验、诺克斯检验和曼特尔检验，对疫情进行分析。疫情在曼尼托巴省斯坦巴赫周围地区呈聚集性，该地区猪群密集。据推测，猪场密度是此次猪流感疫情聚集和传播的一个因素。
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