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目的了解郴州市甲型H1N1流感流行特征,分析流行原因,为防控工作提供科学依据。方法收集郴州市2009-2010年甲型H1N1流感疫情、监测资料,运用描述性流行病学进行分析。结果郴州市2009-2010年报告甲型H1N1流感病例4 459例,发病率95.61/10万,其中重症病例17例(占0.38%),死亡3例,病死率0.67‰;疫情从2009年8月上旬发生输入性病例开始,发病数快速上升,11月份达到发病高峰,2010年1月份快速下降,并维持在较低水平;病例多为在校学生,占病例数的95.70%,男性发病数明显多于女性;发生暴发疫情38起,其中发生在学校36起,续发率3.98%;流感监测显示:9月份以后甲型H1N1流感病毒迅速取代季节性流感病毒,成为流行优势病毒株;甲型H1N1流感病毒感染状况调查IgG抗体阳性率32.28%。结论郴州市甲型H1N1流感疫情通过综合措施得到有效防控;通过加强监测,积极开展疫苗接种,能够有效遏制甲型H1N1流感快速传播。
Objective To understand the epidemiological characteristics of Influenza A (H1N1) in Chenzhou and to analyze its causes and provide a scientific basis for prevention and control. Methods The epidemic situation of Influenza A (H1N1) from 2009 to 2010 in Chenzhou City was collected and monitored. The data were analyzed by descriptive epidemiology. Results In 2009-2010, 4 459 cases of influenza A (H1N1) were reported in Chenzhou City. The incidence rate was 95.61 / 100 000, of which 17 were severe cases (0.38%), 3 were fatal and the case fatality rate was 0.67 ‰. From August 2009 The incidence of imported cases started early in the first ten days of the year, with a rapid increase in the number of cases. The incidence peaked in November and rapidly decreased in January 2010, and remained at a relatively low level. Most of the cases were school-based students, accounting for 95.70% of the total number of cases. Outbreaks occurred in 36 schools, with a recurrence rate of 3.98%. Influenza surveillance showed that influenza A (H1N1) virus rapidly replaced seasonal influenza virus after September and became a predominant virus strain. Type A H1N1 influenza virus infection status of IgG antibody positive rate of 32.28%. Conclusion The epidemic situation of Influenza A (H1N1) in Chenzhou City was effectively controlled and prevented through comprehensive measures. By strengthening the surveillance and active vaccination, the rapid transmission of Influenza A (H1N1) can be effectively controlled.