广州市2009年学校甲型H1N1流感暴发疫情分析

Analysis of outbreaks of the influenza A(H1N1)in schools of Guangzhou in 2009

目的探讨广州市2009年学校甲型H1N1流感暴发疫情流行特征及采取的防制措施,为控制其暴发提供科学依据。方法对广州市2009年发生并经实验室确诊的甲型H1N1流感暴发疫情的现场调查资料进行统计分析。结果 2009年广州市共报告学校甲型H1N1流感暴发疫情196起,其中小学114起,占疫情总数的58.16%。累计报告流感样病例6 548人,涉及305 977人,罹患率介于0.02%～36.51%。9-11月为发病高峰,共报告175起,占全年疫情的89.29%。首发病例到报告的时间与罹患率相关系数为0.268。结论 2009年广州市学校甲型H1N1流感活跃程度高,中小学校为疫情的高发场所,应加强监控。

Objective To investigate the prevalence of influenza A（ H1N1 ）in schools in Guangzhou, and to provide the scientific basis for the control of outbreaks by analyzing the epidemiological characteristics and control illness measures. Methods A field survey of the outbreaks of the influenza A （ H1N1 ） was conducted to test the specimens of throat swab. Results There were 196 outbreaks and 6 548 cases of influenza A（ H1N1 ） were reported in schools in Guangzhou in 2009. The attack rate was between 0.02% to 36.51%. The outbreaks occurred mainly in primary school, 114 outbreaks account for 58.16%. Peak time of influenza A （H1N1） outbreak was from September to November, 175 outbreaks accounted for 89.29%. The correlation coefficient about the attack rate and the time between initial case to report was 0. 268. Conclusion The influenza A （H1N1） virus is active in schools of Guangzhou in 2009. It is important to pay more attention to the surveillance in school.