2011-2012年株洲市流感监测结果分析

Analysis of Influenza Surveillance in Zhuzhou from 2011 to 2012

目的了解湖南省株洲市流行性感冒(流感)流行动态,为及时预警流感活动强度和流感的防治提供参考依据。方法收集2011年第1周-2012年第52周株洲市流感监测流行病学和病原学数据,分析流感样病例(ILI)占门诊病例的百分比(ILI%)、病毒分离率及流感病毒各型的变化规律。结果株洲市2011年第1周-2012年第52周共报告ILI 23 045例,ILI%为4.06%;共采集1 390份ILI咽拭子,流感病毒分离率为16.76%,其中B型流感病毒占阳性标本的65.24%。结论 2012年各周ILI%均低于2011年,提示2012年流感病毒活动较2011年减弱;ILI%与病毒分离率之间正相关(r=0.398,P=0.004),ILI%的变化能够较好的反映当地流感病毒的活动情况。

Objective To investigate the epidemiological dynamic of influenza in Zhuzhou,and to provide scientific evidence for the early warning and effective control of influenza epidemic.Methods The surveillance and etiological detectiondata of influenza like illness（ILI） in Zhuzhou from the 1st week of 2011 to the 52nd week of 2012 were collected,and the analysis was conducted on the proportion of ILI cases in outpatient visits,virus isolation rate and variation law of all types of influenza viruses.Results A total of 23,045 ILI cases were reported in Zhuzhou during the period.The ILI cases accounted for 4.06% of the total outpatient visits.Among 1,390 swabs collected,the influenza rirus isolation rate was 16.76% and influenza B pdm virus accounted for 65.24% of the positive specimens.Conclusions The weekly ILI proportions in 2012 were all lower than those in 2011,suggesting that the activity of influenza was milder in 2012 than in 2011.The ILI proportion was positively correlated with the virus isolation rate（r=0.398,P=0.004）.The variation of ILI can truly reflect the degree of local influenza activity.