北京市甲型H1N1流感病例的流行病学分析

Analysis of cases with novel influenza A(H1N1) virus in Beijing

目的总结北京甲型H1N1流感病例的流行病学特征并分析疫情特点,从而为策略的调整提供参考。方法对北京市4月以来的经机场检验检疫、医院排查和筛查、健康监测发现的流感样症状的患者进行流行病学调查和咽拭子采样。根据甲型H1N1流感诊疗方案(2009年试行版第2版)进行诊断。对确诊病例的流行病学特征进行描述和分析。结果(1)自5月16日北京报告第一例甲型H1N1流感病例以来,截至8月16日,共确诊病例671名;(2)30岁以下的病例占总数的80.9%;(3)输入性病例占66.5%,但本地病例的比例在增加;(4)聚集性发病人数占总数的60.7%,并在不断增加。结论北京甲型H1N1流感的防控形势日益严峻,后期应重点加强对聚集性病例的发现和管理,为秋冬季的大规模流行做好准备。

Objective To analyze the epidemilolgical characteristics of Beijing novel influenza A （H1N1）, so as to provide references to adjustment strategy. Methods The influenza-like illness （ILI） cases from April to August in Beijing were monitored, their epidemilol.gical history were investigated and their throat swab were collected. Cases were diagnosed according to the ＂Proposal of A （H1N1） influenza＂. The epidemilolgical characteristics of Beijing novel influenza A （H1N1 ） were analyzed. Results （ 1 ） Since April to August 16th, 671 novel influenza A （ H1N1 ） cases were confirmed ; （ 2 ） 80.9 % of the cases were younger than 30 years old; （3）66.5% of the cases were from foreign countries, but local cases were increasing; （4）60.7% of cases were cluster cases, and it was increasing. Conclusions We should take more attention to the cluster cases and prepare for the second wave epidemic in autumn and winter.