2017-2018年度河南省流行性感冒监测分析

Surveillance and Analysis of influenza in Henan province in 2017-2018

目的了解2017-2018年度河南省流行性感冒(简称流感)的流行特征及监测中存在的问题,为提高流感监测质量和制定流感防控策略提供支持。方法对2016-2017年河南省流感监测结果及监测状况进行描述性分析。结果2017-2018年河南省流感呈冬春季和秋季双峰流行,秋季流行毒株主要为季节性H3型,冬春季流行前期以B型为主,中后期优势株逐渐转为新甲H1型,流行峰值高于前三个流行年度。年度共报告22起流感暴发疫情,发生场所均为中小学,其中小学15起,占68.18%;中学7起,占31.82%。结论2017-2018年河南省流感流行强度处于历年正常偏高水平,优势株在流行的不同时期出现转换。暴发疫情主要发生于中小学校。

Objective To understand the epidemic characteristics of influenza and the existing problems in the surveillance in Henan province in 2017-2018,so as to provide support for improving the quality of influenza surveillance and formulating influenza prevention and control strategies.Methods Descriptive analysis was conducted on the surveillance results and status of influenza in Henan province from 2016 to 2017.Results From 2017 to 2018,influenza in Henan province presented a double-peak epidemic in winter,spring and autumn.The epidemic strains in autumn were mainly seasonal H3 type,B type dominated in the early stage of the epidemic in winter and spring,and the dominant strains gradually changed to H1N1(pdm09)type in the later stage.The epidemic peak was higher than the previous three epidemic years.A total of 22 outbreaks of influenza were reported in primary and secondary schools,of which 15 were in primary schools,accounting for 68.18%.There were 7 middle schools,accounting for 31.82%.Conclusions The epidemic intensity of influenza was on the high side in Henan province in 2017-2018,and the dominant strains changed in different epidemic periods.The outbreaks have mainly occurred in primary and secondary schools.