2009年-2011年信阳市流感监测结果分析

Analysis of influenza surveillance results in Xinyang during 2009-2011

目的:分析信阳市2009年-2011年流感监测结果,为本市流感预防控制工作提供科学依据。方法:使用Real-time RT-PCR和RT-PCR对病例鼻咽拭子标本进行流感病毒核酸检测。结果:2009年5月-2011年12月共检测流感样病例标本893份,流感病毒核酸阳性348份,阳性率为38.97%。新甲型H1N1流感病毒核酸阳性183份,占流感病例阳性标本的比例为52.59%。16岁～25岁年龄组新甲型H1N1流感阳性率最高(70.4%),60岁以上年龄组阳性率明显降低,两者比较差别有统计学意义(χ2=21.346,P<0.01)。结论:2009年信阳市同时存在甲型H1N1、季节型H1和B型流感病毒,暴发疫情以甲型H1N1流感病毒为主。2010年和2011年冬春季均检出甲型H1N1流感病毒。

Objective：To analyze the influenza surveillance data from 2009 to 2011 in Xinyang,to provide scientific bases for the prevention of influenza.Methods： The specimens of nasopharyngeal swabs were tested for influenza virus nucleic acid by Real-time（RT-PCR） and RT-PCR.Results： Eight hundred and ninety-three influenza-like specimens were tested from May 2009 to December 2011,three hundred and forty-eight cases（38.97%） were influenza virus positive,in which 183 cases were new influenza A H1N1 positive with constituent ratio of 52.59%.The positive rate of influenza A（H1N1） in the age group at 16-25 years was highest,positive rate of the age group more than sixty years was lower obviously and the difference was statistically significant（χ2=21.346,P0.01）.Conclusion： Novel influenza A（H1N1）,seasonal H1 and B influenza viruses coexisted in Xinyang in 2009.The major ILI outbreak were caused by novel influenza A（H1N1）.A（H1N1） influenza virus were detected in winter and spring of 2010 and 2011.