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目的了解淄博市流感流行动态,为及时预警预测流感活动强度和流感的防治提供科学依据。方法收集淄博市2007-2009年流感流行病学监测数据和2009年病原学检测数据,分析流感样病例(ILI)占门诊就诊病例的动态变化,以及2009年流感病毒各亚型的变化规律。结果淄博市2007-2009年共报告ILI 10 100例,ILI%为3.55%。2009年采样610份,流感病毒阳性303份,阳性率49.67%。其中甲型H1N1流感占阳性标本的32.34%,A型未分型流感占62.71%,B型流感占2.31%,季节性H3流感占2.64%。结论淄博市流感活动规律较为明显,存在季节性和周期性;2009年度流感样病例发病年龄分布与以往不同,以5～24岁年龄组为主;2009年冬季季节性流感与甲型H1N1流感流行同时存在,在11月左右甲型H1N1流感成为优势毒株;同时ILI%的变化能够较好地反映当地流感病毒的活动情况。
Objective To understand the prevalence of influenza in Zibo city and provide a scientific basis for early warning and forecasting of influenza activity and prevention and treatment of influenza. Methods The epidemiological surveillance data of influenza in 2007-2009 and the etiological detection data of 2009 in Zibo were collected to analyze the dynamic change of outpatient cases of influenza-like illness (ILI) and the variation regularity of influenza virus subtypes in 2009. Results A total of 100 ILI cases were reported from 2007 to 2009 in Zibo City, ILI% was 3.55%. In 2009, 610 samples were collected, 303 were positive for influenza virus, the positive rate was 49.67%. Among them, influenza A (H1N1) accounted for 32.34% of positive samples, type A (62.71%), type B (2.31%) and seasonal H3 (2.64%). Conclusions The pattern of influenza activity in Zibo City is more obvious with seasonal and periodicity. The distribution of influenza-like illness in 2009 is different from the past, with the age of 5-24 years being predominant. In 2009, the prevalence of seasonal influenza and Influenza A (H1N1) At the same time, Influenza A (H1N1) became the predominant strain in November. At the same time, the change of ILI% could better reflect the local influenza virus activity.