无锡市新吴区2017-2019年流感暴发疫情流行特征及影响因素分析

Epidemiological characteristics and influencing factors of influenza outbreaks in Xinwu district of Wuxi from 2017 to 2019

摘要:

目的 描述2017-2019年无锡市新吴区流感暴发疫情流性特征及其影响因素，为学校流感暴发疫情防控提供依据。 方法 收集“中国流感监测信息系统”和“突发公共卫生事件管理系统”中上报的2017-2019年流感数据，对其流行病学特征进行描述性分析，并对流行强度和疫情持续时间的相关因素分析。 结果 2017-2019年新吴区共发生26起流感暴发疫情，累计发病人数927例，平均罹患率1.74%。暴发疫情主要发生在12月到次年的4月之间，占100%。疫情均发生在学校，以小学最多占88.46%（23/26），其次为幼儿园占11.54%（3/26）。引起流感暴发疫情的流感病毒主要B型Victoria系和Yamagata系，分别占65.60%（164/250）和16.40%（41/250），其次为A型H3N2占16%（40/250）。流行强度与学校人数有关（P＜0.05），疫情持续时间与学校类型、疫情报告时间有关（P＜0.05）。结论 流感暴发具有明显的季节性，发生场所主要在学校，提高疫情报告及时性，及时采取措施是控制学校流感暴发疫情流行的关键。

Abstract:

Objective To understand the epidemiologic characters and influencing factors of influenza outbreaks in xinwu district of wuxi from 2017 to 2019，so as to provide reference for prevention and control of influenza. Methods We Collected the data on reported in 2017-2019 form China Influenza Surveillance Information Systerm and China Public Health Emergency Management Information. Epidemiological characteristics and population influencing factors on epidemic strength and time were analyzed. Results A total of 26 influenza outbreaks in were reported and the total number of case was 927 in Xinwu during this period. The average attack rate was 1.74%.100% outbreaks occurred from December to the next April. All the outbreaks occurred in schools, in which 88.46% occurred in primary schools and 11.54% occurred in kindergartens. The outbreaks mainly caused by Victoria B(65.60%)and Yamagata B(16.40),H3N2(16%).Epidemic strength of influenza time was correlated with the number of students in school(P＜0.05),and the epidemic time was correlated with the type of school and the reporting time(P＜0.05).Conclusion Influenza outbreaks is seasonal and mainly occurred in school. It is essential to improve the timeliness outbreaks reporting and take early control measures to reduce influenza outbreak in schools.