2009年四川省绵阳市甲型H1N1流感疫情分析

Epidemiological analysis of influenza A (H1N1) in Mianyang,2009

目的了解四川省绵阳市2009年甲型H1N1流行性感冒(甲型H1N1流感)疫情的流行病学特征。方法从中国疾病预防控制系统和现场调查资料中收集绵阳市甲型H1N1流感疫情的相关信息,采用描述性流行病学方法分析结果。结果 2009年绵阳市共诊断甲型H1N1流感407例,其中,经实验室确诊甲型H1N1流感病例393例,疑似病例14例。重症病例20例,危重病例6例,死亡病例1例。绵阳市所辖9个县(市、区)均有甲型H1N1流感疫情发生,发病数居前3位的依次是涪城区(60.20%)、三台县(18.67%)和安县(6.88%)。发病高峰为9-10月。确诊病例平均年龄16.6岁,男女性别比为1.51∶1。结论绵阳市甲型H1N1流感防控形势严峻,应加强流感样病例监测和重症病例诊断治疗,加强重点人群甲流疫苗接种工作。

Objective To determine the epidemiological characteristics of influenza A（H1N1） in Mianyang.Methods Descriptive epidemiological approaches were employed to analyze the data on influenza A（H1N1） collected from the China Information System for Disease Control and results of on-spot investigations.Results A total of 407 influenza A/（H1N1） cases were confirmed in Mianyang in 2009.Among them,there were 393 confirmed cases through laboratory test,14 suspected,20 severe,6 critically severe cases,and 1 death.Influenza A（H1N1） outbreaks were present in the 9 counties under Mianyang.The top-three highest incidence rates were from Fucheng（60.20%）,Santai（18.67%） and Anxian（6.88%）.The incidence peaked from September to October.The average age of confirmed patients was 16.6 years,and the male to female ratio was 1.51∶1.Conclusion In view of the serious epidemic of influenza A（H1N1） in Mianyang,it is important to strengthen the surveillance of influenza-like illness and the diagnosis and management of severe cases,and to promote vaccine inoculation for vulnerable population.