Epidemiological characteristics and influence factors of influenza outbreak in Shaanxi province,2006-2013
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摘要: 目的 了解陕西省2006—2013年流感暴发疫情的流行特征和影响因素,为防控策略的制定提供科学依据。方法 收集陕西省突发公共卫生事件报告管理信息系统2006年1月1日—2013年12月31日报告的流感暴发疫情资料,分析流感暴发疫情的流行特征和疫情持续时间、罹患率的影响因素。结果 2006—2013年陕西省共报告73起流感暴发疫情;疫情报告时间主要集中在每年10月至次年2月,共报告57起(78.08%);疫情报告地区主要集中在关中和陕南地区,共报告63起(86.30%);流感暴发疫情主要发生在学校,全省各类学校学累计报告起流感暴发疫情71起(97.26%);引起流感暴发疫情的病毒亚型主要为新甲型H1N1和B型流感病毒,分别占流感暴发疫情总数的72.60%和20.55%;学校规模、采取措施时间和病原类型与流感暴发疫情持续时间有关(均P<0.05),所在区域、学校规模、班级人数、采取措施时间和停课方式与流感暴发疫情流行强度有关(均P<0.05)。结论 陕西省流感暴发疫情主要集中在11月—次年2月,以局部暴发为主,学校是流感暴发疫情的高发场所,尽早采取措施是流感暴发疫情最有效的防控手段。Abstract: Objective To examine the characteristics and influence factors of influenza outbreak in Shaanxi province and to provide references for the prevention and control of influenza.Methods Data on influenza outbreaks from January 1,2006 to December 31,2013 were collected from public health emergence report information system and epidemiologic characteristics and influence factors of the outbreaks were analyzed.Results A total of 73 influenza outbreaks were reported in the province during the period. The reports of influenza outbreak concentrated from October of a year to February of the next year,accounting for 78.08%of all outbreaks.The influenza outbreaks were reported mainly in Guanzhong and Shaannan areas(63 outbreaks,86.30%).The most of the reported outbreaks(71,97.26%)occurred in schools and the prevalent influenza strains of the outbreaks were novel influenza A H1N1 and influenza B,accounting for 72.60%and 20.55%of the outbreaks.Based on the analyses for 64 school outbreaks,the duration of an influenza outbreak associated with the scale of the school,the time of taking control measures,and types of influenza virus(all P<0.05)and the intensity of an outbreak related to epidemic region,the scale of the school,the number of pupils in a class,the time of taking control measures and the pattern of class suspension(all P<0.05).Conclusion The influenza outbreaks were mainly local epidemic and occurred mainly in schools and during the period of November of a year to February of the next year in Shaanxi province from 2006 to 2013,suggesting implementation of preventive measures as soon as possible is most effective for the control of the outbreak.
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Key words:
- influenza /
- epidemic outbreak /
- epidemiological characteristics /
- influence factor
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