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目的探讨细菌性痢疾(Bacillary dysentery)流行的季节性流行规律,为制定细菌性痢疾防控策略和措施提供依据。方法应用集中度及圆形分布法对河南省2004~2011年的细菌性痢疾季节性分布进行分析。结果河南省2004~2011年的细菌性痢疾季节性分布的M值为0.413,2004~2007年的M值为0.425,2008~2011年的M值为0.393;圆形分布总的集中趋势r值为0.426。2004~2007年的发病高峰日、流行高峰期及高峰期时间跨度分别为7月29日、5月18日~10月8日及144 d,2008~2011年的则为8月1日、5月8日~10月25日及171 d。结论细菌性痢疾发病有一定的季节性分布特征,5~10月为该病的流行高峰;河南省该病的季节性在逐渐减弱,应根据其流行特点的变化适时调整防控策略。
Objective To investigate the seasonal epidemic pattern of Bacillary dysentery and provide the basis for the prevention and control strategies and measures of bacillary dysentery. Methods The distribution of bacterial dysentery in Henan Province from 2004 to 2011 was analyzed by using concentration and circular distribution method. Results The seasonal distribution of bacillary dysentery from 2004 to 2011 in Henan Province was 0. 413, the value of M was 0. 425 in 2004-2007, and the value of M was 0.393 in 2008-2011. The total concentration of circular distribution was r 0. 426. From 2004 to 2007 peak incidence, the prevalence of peak and peak time span were July 29, May 18 to October 8 and 144 d, 2008 to 2011 is August 1 , May 8 to October 25 and 171 d. Conclusions The incidence of bacterial dysentery has some seasonal distribution, and the epidemic peak is from May to October. The seasonal of the disease is gradually weakened in Henan Province. The prevention and control strategies should be adjusted according to the changes of epidemic characteristics.