江苏省流感和流感样病例暴发疫情流行病学分析

The epidemiological study on influenza and Influenza-like illness outbreak in Jiangsu province

目的：摸清江苏省流感或流感样病例暴发的特征。方法：对流感或流感样病例暴发的时间、地区、人群和暴发规模以及实验室检测的情况进行描述。结果：2004年4月--2007年3月度全省共报告流感或流感样病例暴发61起，累计发病8116人，2005年流感暴发强度大。所有事件发生在每年的12月份至次年4月份。农村地区的暴发起数与发病数均高于城市，暴发事件全部发生在学校。发病数在50人以上的暴发占86．89％。2004年--2006年度，暴发事件采样检测率达95．08％，3年来，H3N2、B、H3N2型先后成为优势循环株。结论：江苏省流感暴发具有明显的季节性，循环优势株变化频繁，应及时加强对流感暴发疫情的监测。

Objective： To investigate epidemiologic characteristics of influenza and Influenza-like illness outbreak in Jiangsu province from April 2004 to March 2007. Methods： Influenza surveil-lance data as used to evaluate the status of influenza and Influenza-like illness outbreak. Results： The total number of outbreaks was 61 with 8 116 cases and the scale of outbreak was the most serious in 2005. All events occurred from December of last year to April of subsequent year. The total number of outbreak or the incident cases was higher in rural areas than that in urban areas, and all events happened in school. The number of outbreak referring to above 50 cases covered 86.89%. The sample detection rate in outbreaks was 95.08% and dominating circulating influenza viral was H3N2, B, H3N2 respectively from 2004 to 2007. Conclusion.. Influenza activity was characterized by seasonal, and the dominating circulating influenza viral varied frequently, so it was very important to intensify the influenza surveillance work.