2009~2010年上海市长宁区流感疫情流行病学分析.docVIP

2009~2010年上海市长宁区流感疫情流行病学分析摘 要 目的：探讨2009-2010年长宁区的流感流行特征。方法：对辖区内开展的流感样病例（简称ILI病例）监测情况和病原学监测结果进行流行病学分析。结果：2009-2010年报告流感病例355例，2009年和2010年的甲型H1N1流感和季节性流感发生比例有明显差异（χ2 =77.02，P＜0.00）。2009-2010年共监测2840例ILI病例，平均就诊百分比为0.30%，ILI病例发生呈时间分布，高峰在2009年5～8周、34～40周和49周至2010年第8周。病原学监测阳性率为37.56%，2009年8-9月甲型H3型为主要流行株，2009年10月至2010年1月以甲型H1N1型为主导毒株，2010年2-6月，B型毒株替代甲型H1N1型成为主要流行株，7-10月甲型H3型再次成为流行株，11-12月甲型H1N1、甲型H3和B型毒株混合流行。结论：病原学监测阳性检出率与ILI病例流行高峰基本一致，加强ILI病例监测可有效预防流感暴发。 关键词 流感 监测 病原学 中图分类号：R183.3 文献标识码：A 文章编号：1006-1533(2012)02-0034-03 The epidemiological analysis on surveillance for influenza in Changning District, Shanghai from 2009 to 2010 HE Xiao-ding1，LI Ying1，LI Yan-ting2 （1. Changning centers for disease control and prevention，Shanghai，200051； 2. Shanghai centers for disease control and prevention，Shanghai，200336） ABSTRACT Objective: The study was conducted to explore the epidemiological characteristics of influenza in Changning District. Method: The epidemiological analyses were conducted based on the surveillance of influenza and influenza like illness（ILI）cases and etiological results in Changning District，Shanghai. Results: 355 influenza cases were reported from 2009-2010. The proportion rate of A（H1N1） influenza and seasonal influenza from 2009-2010 had obvious difference （χ2=77.02，P＜0.00）. 2840 ILI cases were observed in 2009-2010 totally，the percentage of the average diagnosis was 0.30%. The cases presented a seasonal character. The peak occurred during week 5-8、week 34-40 in 2009 and week 49 in 2009-week 8 in 2010. The positive rate of etiological surveillance was 37.56%. The epidemic strains of influenza were A （H3） during August to September in 2009 and turned to A（H1N1）during October in 2009 to January in 2010 and turned to B during February to June in 2010. During July to Oct. A（H3） became the main epidemic strains again. Strains A（H1N1）、A（H3） and B were all in vogue during November to December in 2010. Conclusion: The etiological surveillance posi