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目的了解杭州市流行性感冒(流感)样病例疫情流行特点。方法通过杭州市流感监测网络,收集整理流感样病例疫情资料;利用反转录-聚合酶链反应技术检测流感病毒。结果2006-2007年共发生流感样病例疫情67起,流感样病例2703例,总罹患率为3.77%。各起疫情平均报告时间为5 d。2006年疫情平均持续时间为6 d,2007年为13 d,差异有统计学意义(u=-4.37,P<0.05)。2006-2007年疫情发生时共采样186份,其中阳性126份,阳性率为67.74%。2006年流行株为B型,2007年为A型H3亚型。结论2006年及2007年杭州市流感流行表现为散发及局部暴发,2年流行的毒株不同。
Objective To understand the epidemic characteristics of influenza-like cases in Hangzhou. Methods Through the influenza surveillance network in Hangzhou, the epidemic data of influenza-like cases were collected and analyzed. The influenza virus was detected by reverse transcription-polymerase chain reaction (RT-PCR). Results A total of 67 influenza-like illness outbreaks occurred in 2006-2007, 2703 influenza-like illness cases and the total attack rate was 3.77%. The average reporting time of each epidemic situation was 5 days. The average duration of the outbreak in 2006 was 6 days and in 2007 was 13 days, the difference was statistically significant (u = -4.37, P <0.05). A total of 186 samples were collected during the period of 2006-2007, of which 126 were positive, with a positive rate of 67.74%. The epidemic strain was type B in 2006 and type A H3 subtype in 2007. Conclusion The influenza epidemic in Hangzhou in 2006 and 2007 was characterized by sporadic and local outbreaks, and the two-year-old strains were different.