2007-2010年度宁夏流感监测结果分析

Analysis of influenza surveillance in Ningxia from 2007 to 2010

目的掌握宁夏2007-2010年度流感的流行特征和病原学变化规律,为预测和防控流感大流行提供科学依据。方法采用回顾性方法对流感监测点报告的流感样病例(ILI)进行统计,采集流感样病例标本鉴定病毒型别,对监测结果进行分析,并与近2年的度数据进行比较。结果 2009-2010年度ILI%的监测高峰出现在2009年第43周-2010年第1周,明显高于近2年度监测平均水平;ILI主要集中在5-24岁年龄组,标本阳性率为23.87%,暴发疫情多发生在学校。结论 ILI的流行病学监测可以反映出流感活动状况,2009-2010年度流感的流行程度明显高于2007-2008和2008-2009年度;本监测期的优势毒株先后为A型(H1N1)亚型和B型,宁夏的流感病毒优势株每年发生改变。

Objective To investigate the influenza epidemic characteristics and the variation laws of etiology in Ningxia from 2007 to 2010,and to provide scientific evidence for the forecasting and prevention of influenza.Methods The proportion of seeking health care of influenza like illness（ILI%） in the monitoring point report which is from 2007 to 2010 were collected the sample of influenza like illness,identified the virus type,analyzed the monitoring results and compared with the data from 2008 to 2009.Results From 2007 to 2010,ILI% peak appeared from 43rd weeks in 2009 to the 1st week in 2010,and it was significantly higher than the average level of annual monitoring 2007-2008 and 2008-2009;the influenza like cases are mainly concentrated in the 5-24 age group;the samples positive rate 23.87%;outbreak occurred mostly in school.Conclusion Epidemiological surveillance of influenza-like cases could reflect the status of influenza activity;In the monitoring period,the A（H1N1） subtype and the B-type are the advantage strains.The advantage strains of influenza virus changes once every year in Ningxia.