目的分析石家庄市流行性感冒(简称流感)流行病学特征,为流感的防控提供参考依据。方法收集2012年4月-2013年3月石家庄市流感样病例的监测数据,分析流行病学及病原学检测结果。结果 2012-2013年石家庄市流感监测哨点医院流感样病例(influenza-like illness,ILI)就诊百分比(ILI%)平均为1.05%,冬春季节出现流行高峰。共采集流感样病例标本711份,核酸检测阳性108份,阳性率为15.18%。分离得到流感毒株92株,总分离率为12.94%,其中B型1份、甲型H1N1型47份、季节性H3N2型44份。结论石家庄市流感活动具有季节性特点,活动高峰期出现在冬春季节,ILI流行高峰与病毒检出高峰基本一致。季节性H3N2型流感毒株在2013年1月前为主要优势流行株,2013年1月后甲型H1N1型流感毒株成为优势流行株。病毒分离率与年龄及性别无关。 Objective To analyze the epidemiological characteristics of influenza in Shijiazhuang City (referred to as influenza) and provide a reference for the prevention and control of influenza. Methods The surveillance data of influenza-like cases from April 2012 to March 2013 in Shijiazhuang City were collected, and the epidemiological and etiological test results were analyzed. Results The mean ILI% of ILI from 2012 to 2013 in the influenza surveillance sentinel hospital in Shijiazhuang was 1.05%, with a peak in winter and spring. A total of 711 influenza-like specimens were collected, 108 were positive for nucleic acid detection, the positive rate was 15.18%. 92 influenza strains were isolated and the total isolation rate was 12.94%, of which 1 was type B, 47 were influenza A H1N1 and 44 were seasonal H3N2. Conclusion The seasonal influenza activity in Shijiazhuang is seasonal. The peak of activity appears in winter and spring, and the peak of ILI epidemic is basically the same as that of virus. Seasonal H3N2 influenza strains were the major prevalent strains before January 2013. Influenza A (H1N1) strains became the predominant strains after January 2013. Virus isolation rate has nothing to do with age and gender.