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目的分析北京市房山区2014年27周~2016年26周流感监测结果。方法利用“北京市医疗机构传染病监测预警系统”中流感样病例周数据以及哨点医院流感病原学监测周数据,分析房山区流感样病例发病趋势和流感病毒构成情况。结果 2014年第27周~2016年第26周,房山区流感样病例(ILI)、流感样病例百分比(ILI%)与流感病毒阳性率变化趋势一致(r=0.715,P<0.01;r=0.721,P<0.01),发病高峰为每年冬春季。2014-2016年,流感样病例年龄组构成不同(χ2=112.486,P<0.01),流感病毒亚型构成不同。共报告流感暴发疫情16起,其中10起(62.50%)由甲型H3N2引起。结论 2014-2016年流感病毒流行强度及流行毒株不一。ILI、ILI%和流感病毒阳性率三者的高峰基本吻合,证实了房山区流感监测系统在预警预测流感流行趋势和暴发疫情中的实际作用。
Objective To analyze the results of influenza surveillance in Fangshan District, Beijing from week 27 to 2016 of 26 weeks. Methods The data of influenza-like illness cases and epidemiological surveillance data of influenza in sentinel hospital were used to analyze the incidence of influenza-like illness and the composition of influenza virus in Fangshan District. Results The trend of ILI and ILI% in Fangshan District from the 27th week of 2014 to the 26th week of 2016 was consistent with the positive rate of influenza virus (r = 0.715, P <0.01; r = 0.721 , P <0.01). The peak incidence was annual winter and spring. In 2014-2016, there were different age-groups of influenza-like cases (χ2 = 112.486, P <0.01), and the influenza virus subtypes were different in composition. A total of 16 influenza outbreaks were reported, of which 10 (62.50%) were caused by influenza A H3N2. Conclusion The prevalence of influenza virus and the prevalence of different strains in 2014-2016 are different. ILI, ILI% and the positive rate of influenza virus basically coincide with each other, confirming Fangshan influenza surveillance system in predicting the trend of influenza epidemic and outbreak of the actual role.