2004 - 2016年四川省流感暴发疫情流行病学分析

目的 分析四川省2004 - 2016年流感暴发疫情的流行病学特征，为防控提供参考。方法 收集2004 - 2016年全省报告的流感暴发疫情资料，对疫情的时间、场所、病毒型别等信息进行分析。结果 2004 - 2016年四川省共报告流感样病例数为10例及以上流感样病例暴发疫情325起，其中168起经实验室检测证实为流感暴发疫情，主要由甲型H1N1流感（35.12%）和H3N2流感（35.12%）病毒引起。流感暴发疫情数以2004年（141起）和2009年（103起）报告最多，2009年疫情集中在9 - 10月，其他年份主要集中于冬春季，且均在学校寒暑假期间迅速减少。流感暴发的最主要场所为中小学校，报告疫情302起（占92.92%），疫情规模以50 例以下为主。结论 强化监测，在优势毒株更替、毒株变异或新毒株出现初期及时预警，强化疫情防控，减少疾病危害；加强基层人员流行病学基本概念、疫情处置工作培训，以准确收集疫情信息。

Epidemiological analysis of influenza outbreaks in Sichuan province from 2004-2016

Objective To understand the epidemiological characteristics of influenza outbreaks in Sichuan province from 2004 to 2016. Methods Collect information on the outbreak of influenza reported in the province from 2004 to 2016, and analyze the time, place and virus type of the outbreak. Results From 2004 to 2016, a total of 325 influenza-like illness outbreaks were reported in Sichuan province, in which 168 influenza outbreaks were laboratory confirmed, and influenza A(H1N1) pdm09 virus (35.12%) and influenza H3N2 virus (35.12%) were predominant. More influenza outbreaks were reported in 2004 (141) and 2009 (103), with most reported outbreak on September and October in 2009, and in the other years mainly occurred during winter-spring; fewer influenza outbreaks occurred in winter and summer vocations of schools. Influenza outbreaks mainly occurred in primary and middle schools, where 302 outbreaks were reported, accounting for 92.92% of the total. The scale of the outbreak is mainly outbreak with fewer than 50 cases. Conclusion To strengthen the monitoring, the dominant strain change, strain variation, or new strain appearance early warning in time, strengthen epidemic prevention and control, and reduce the disease. Strengthen the basic education of epidemiological outbreak, and the grass-roots staff training, in order to accurately collect epidemic information.