上海市浦东新区2008—2010年流感监测点疫情分析

Epidemiological analysis for influenza surveillance in Pudong New Area from 2008 to 2010

[目的]了解上海市浦东新区流感流行趋势及病原学特征。[方法]监测点医院每周填写流感样病例（ILI）报表并上报网络,监测点医院每周采集ILI鼻咽试子5~20份送浦东新区疾病预防控制中心进行流感病原检测。[结果]流行病学监测及病原学监测显示,2008年（3月、8月）、2009年（1月、8月、12月）、2010年（9月）的ILI百分率值及ILI流感病毒阳性率均为监测峰值。2008年2月以B（Yam agata）亚型毒株为主,3月以A（H3N2）亚型毒株为主;2008年7月—2009年2月以A（H1N1）亚型毒株为主,2009年7月—8月以A（H3N2）亚型毒株为主,2009年9月—2010年1月以甲型H1N1亚型毒株为主,2010年2月—3月以B（V ictoria）型毒株为主,2010年8月—11月以A（H3N2）型毒株为主。[结论]2008年呈现冬春季和夏秋季的双峰型分布,2009年呈现冬春、夏秋季、冬季延伸至2010年春3峰流行,2010年呈现夏秋季高峰流行。流感毒株亚型循环流行。

[Objective] To explore influenza trend and its strains of the virus in Pudong New Area. [Methods] Epidemiological surveillance： Cases of influenza-like illnesses（ILI） were filled in forms weekly by monitoring hospitals and submitted to the network.Etiological surveillance： 5～20 mouth-rinsing samples were collected and detected for influenza virus weekly by monitoring hospitals and then submitted to Disease Control and Prevention Center of Pudong New Area for pathogen detection of influenza. [Results] Epidemiological and pathogenic surveillance indicated that ILI percentage and positive rate of influenza virus were at the peak in March and August 2008,and March,August and December 2009 and September 2010.The predominant epidemic strain was Influenza B（Yamagata） in February 2008,A（H3N2） in March 2008,A（H1N1） from July 2008 to February 2009,A（H3N2） from July to August 2009,swine A（H1N1） from September 2009 to January 2010,B（Victoria） from February to March 2010 and A（H3N2） from August to Eleven 2010. [Conclusion] Two peaks were observed in 2008：one in winter-spring,and the other in summer-autumn.Three peaks were observed in 2009：one in the beginning of 2009,another in summer-autumn and the last in the end of 2009.Summer-autumn peak was observed in 2010.Influenza virus subtypes were prevalent in circulation.