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目的分析2005-2012年湖区5省急性血吸虫感染(急感)发病时间及空间聚集性,为制定防治策略和采取有效控制措施提供科学依据。方法收集2005-2012年湖区5省急感病例基本信息,采用集中度和圆形分布法对急感的流行季节及时间聚集性进行分析,并采用空间自相关分析对病例的空间聚集性进行分析。结果急感发病具有较强的季节性,集中度为0.758,其发病高峰日为8月10日左右。急感病例分布图提示急感病例在空间上高度聚集于鄱阳湖、洞庭湖及长江流域周边5省的23个县,空间自相关分析结果显示2005-2012年间急感空间自相关系数I=0.16(P=0.01)。结论湖区5省急感发病时间上具有较强的季节性,空间上呈聚集状态,可据此将防控关口前移,在高聚集区开展有针对性的防控措施。
Objective To analyze the onset time and spatial clustering of acute schistosomiasis (acute infection) in 5 provinces in the lake from 2005 to 2012 and provide scientific evidence for the development of control strategy and effective control measures. Methods The basic information of five cases of acute illness in the lake area from 2005 to 2012 was collected. The epidemic seasons and the time aggregation of the acute illness were analyzed by using the concentration and circular distribution method. Spatial autocorrelation analysis was used to analyze the spatial aggregation of the cases . The results of acute onset has a strong seasonal, concentration of 0.758, the peak incidence on August 10 or so. The distribution maps of acute cases suggest that the acute cases were highly spatially clustered in 23 counties of 5 provinces around Poyang Lake, Dongting Lake and the Yangtze River Basin. The spatial autocorrelation analysis showed that the autocorrelation coefficient of acute space I = 0.16 (P = 0.01). Conclusions The onset time of acute illness in the five districts in Hunan Province is quite seasonal and spatially aggregated. Therefore, the prevention and control gateway can be advanced and targeted prevention and control measures can be carried out in high concentration areas.