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目的对2006-2012年湖北省流感监测结果进行分析,为湖北省的流感防控工作提供科学依据。方法通过流行病学调查及病原学监测,对湖北省近年的流感流行状况进行分析。结果 2006-2012年,湖北省共报告297起流感样病例暴发疫情,流感样病例(influenza-like illness,ILI)比例平均为4.63%;0~5岁年龄组人群在ILI中所占比重最大,为50.71%;随着年龄的增长,ILI比例逐渐递减,60以上年龄组人群所占比重最低,仅为2.24%。各年龄组流感样病例比例随时间呈现季节性差异,疫情报告的时间分布主要为每年春节前后及开学季。毒株型别分布呈现交替流行态势,且除2011年外,其余年度均呈现冬春季及夏季两个流行高峰。结论湖北省流感流行峰及优势毒株呈现季节性及交替分布态势,长期稳定的病例及病原学监测可以为流感疫情的预警、疫苗株的选择提供良好的实验室依据。
Objective To analyze the results of influenza surveillance in Hubei Province from 2006 to 2012, and provide a scientific basis for the prevention and control of influenza in Hubei Province. Methods The prevalence of influenza in Hubei Province in recent years was analyzed through epidemiological investigation and etiological monitoring. Results From 2006 to 2012, a total of 297 influenza-like illness outbreaks were reported in Hubei Province. The average proportion of influenza-like illness (ILI) was 4.63%. The proportion of ILI among 0-5 years old group was the largest, As 50.71%. With the increase of age, the proportion of ILI gradually decreased. The proportion of people in the age group of 60 was the lowest, only 2.24%. The proportion of flu-like cases in each age group showed seasonal differences with time. The time distribution of the epidemic reports was mainly around the Spring Festival and the first semester. The strain distribution showed an alternate epidemic trend, and except for 2011, the rest of the year showed two epidemic peaks in winter, spring and summer. Conclusions The epidemic peaks and dominant strains of influenza in Hubei Province show a seasonal and alternate distribution trend. Long-term and stable cases and etiological monitoring can provide a good laboratory evidence for early warning of influenza epidemic and selection of vaccine strains.