绵阳市2009～2010年流感样病例哨点监测结果分析

目的了解2009～2010年绵阳市流感流行状况,为制定预防控制策略提供依据。方法收集绵阳市2009～2010年流感样病例(ILI)监测资料、流感病毒病原学监测结果以及暴发疫情信息进行分析。结果 2009～2010年3家哨点医院上报ILI36774例,占门急诊总病例数(ILI%)的7.84%,病例以≤24岁的儿童、青少年为主,占87.36%;2009年9～12月呈现1个发病高峰,2010年1～7月疫情平稳,无明显季节性波动;发热门诊的ILI%最高,为87.84%;共采集818份ILI病例标本,经RealtimeRT-PCR法检测,流感病毒核酸阳性标本共381份,阳性率46.58%。包括甲型H1N1流感病毒271份(33.13%),A型未分型流感病毒95份(11.61%),B型流感病毒15份(1.83%);共发生暴发疫情5起,均发生在中、小学校,由甲型H1N1流感病毒引起。结论哨点医院ILI报告质量有待提高,流感监测网络实验室应积极准备开展流感病毒分离工作,加强对各型流感病毒的监测,以预防、控制流感的流行。

Analysis of influenza like illnesses sentinel surveillance in Mianyang,2009-2010

OBJECTIVE To analyze the epidemic characteristics of influenza in Mian Yang during 2009-2010 and to formulate programs to prevent and control the disease.METHODS Surveillance data,virus type and outbreak information of influenza like illnesses(ILI)in Mianyang from 2009 to 2010 were collected for analysis.RESULTS A total of 36 774 ILI cases were reported by the three surveillance hospitals from 2009 to 2010,accounting for 7.84% of the total outpatients.Most cases were children and teenagers aged ≤24 years old accounting for 87.36% of the total cases.The incidence peaked during Semptember to December in 2009,while in 2010 the influenza activity was stable without obvious seasonality.ILI cases reported by fever diagnosis ward were the most accounting for 87.84%.A total of 818 specimens of ILI cases were detected by Real time RT-PCR and the 381 specimens were the positive strains with the positive rate of 46.58% including 271(33.13%)A/H1N1,95(11.6%)A and 15(1.83%)B influenza virus.Five outbreaks caused by A/H1N1 virus occurred in middle and primary schools.CONCLUSION The quality of the ILI cases reported by surveillance hospitals should be improved and the flu laboratory should prepare to do the influenza virus isolation and identification.It is necessary to enhance the influenza surveillance to prevent and control influenza.