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[目的]分析2009年泰安市流感流行特征及病原变化情况。[方法]对2009年5月11日至12月31日泰安市流感监测哨点医院和流感暴发疫情监测资料进行分析。[结果]2009年,监测哨点医院门诊流感样病例占同期门急诊就诊总数的4.97%,这一比例,第20～35周为2.71%,第35～42周为7.06%,第43～50周为7.84%,第51～53周为3.70%;检测690例病人鼻咽拭子或下呼吸道标本,流感病毒核酸阳性率为45.36%,阳性标本中甲型H1N1流感病毒占87.54%。期间发生流感样疾病暴发疫情61起,其中由甲型H1N1流感病毒引起的占83.61%。[结论]甲型H1N1流感病毒是2009年流感流行季节的优势毒株。
[Objective] To analyze the epidemic characteristics and pathogenic changes of influenza in Tai’an City in 2009. [Method] The surveillance data of influenza surveillance sentinel hospitals and influenza outbreaks in Taian City from May 11 to December 31, 2009 were analyzed. [Results] In 2009, outpatient influenza-like illness in sentinel hospitals accounted for 4.97% of the total number of outpatient and emergency visits. The proportion was 2.71% in weeks 20 to 35, 7.06% in weeks 35 to 42, and 43 to 50 Week was 7.84%, the first 51 ~ 53 weeks was 3.70%; detection of 690 cases of nasopharyngeal swabs or lower respiratory tract specimens, positive rate of influenza virus nucleic acid was 45.36%, positive samples of influenza A H1N1 influenza virus accounted for 87.54%. During this period, 61 outbreaks of influenza-like illness were reported, of which 83.61% were caused by the influenza A (H1N1) virus. [Conclusion] Influenza A H1N1 influenza virus is the predominant strain in 2009 influenza season.