合肥市2009～2011年流行性感冒监测报告

目的研究合肥市2009～2011年流行性感冒(简称流感)流行状况及型别分布,并分析其流行趋势,为流感的防控提供科学依据。方法每周统计监测点流感样病例(ILI)数据,采集流感样病例鼻咽拭子标本,使用荧光PCR检测流感病毒核酸。结果 2009年9～12月流感活动达到高峰期,2010～2011年则表现为夏秋和冬季双峰分布。2009年6～8月份以季节性H1N1流感病毒占优势,2009年9～12月转变为甲型H1N1流感病毒占优势,2010年1～3月份又转变为乙型流感病毒占优势,2010年8～10月又变为季节性H3N2,至2011年1月份又再次转变成甲型H1N1流感占优势。2009～2011年两个监测周期中,ILI%分别为6.81%和2.16%;流感病毒核酸阳性率分别为51.34%和10.18%。结论 2009～2011年度合肥市出现流感流行高峰。季节性H3N2、H1N1流感病毒和甲型H1N1、乙型流感病毒均有流行。

Surveillance Report Of Influenza In Hefei From 2009 To 2011

Objective To understand the prevalence status and the virus-types of influenza in Hefei from 2009 to 2011,analyze its prevalent trend,and provide scientific evidence for the disease control and prevention.Methods Surveillance data of Influenza-like illness（ILI） in sentinel hospitals were weekly statistically analyzed.Nose and throat swab specimens of ILI were collected and tested for influenza virus nucleic acid by Fluorescent PCR.Results In 2009,the whole period from September to December was the peak of influenza activity.But in 2010 and in 2011,the incidence of influenza showed a typical bimodal distribution,and the first peak occurred in summer and autumn,the second peak occurred in the winter.The dominant virus changed through time,they were seasonal H1N1 influenza virus from June to August,2009,new H1N1 influenza virus from September to December,2009,Influenza B virus from January to March,2010,seasonal H3N2 influenza virus from August to October,2010,new H1N1 influenza virus from January,2011 respectively.In the two monitoring cycles from 2009 to 2011,ILI accounted for 6.81% and 2.16% respectively,and the positive rate of Influenza virus nucleic acid was 51.34% and 10.18% respectively.Conclusion The influenza epidemic peak was appeared in Hefei in 2009——-2011,for pathogens including seasonal H3N2 influenza virus,H1N1 influenza virus,new H1N1 influenza virus and influenza B virus.The surveillance of Influenza should be enhanced to prevent and control the epidemic of influenza.