摘要
目的了解流行性感冒(简称流感)流行特征及流感毒株变迁情况,为全省流感的防控提供参考依据。方法从中国流感监测信息系统中导出湖南省2014—2023年的流感监测数据。比较不同年份、不同人群流感样病例百分比[门急诊就诊人数中流感样病例(ILI)百分比(ILI%)]、ILI标本流感病毒阳性率的差异。结果2014—2023年共报告ILI 265万余例,ILI%为4.70%。不同年份ILI%比较,差异有统计学意义(P<0.001);年龄0~14岁者是具有流感样症状的主要群体,占82.90%。ILI标本流感病毒阳性率为14.14%,不同年份、不同年龄组流感病毒阳性率比较,差异均有统计学意义(均P<0.001)。2014—2023年主要流行的流感毒株有A(H1N1)型、A(H3N2)型、B(Victoria)型、B(Yamagata)型,不同年份之间呈现交替流行,但2020—2023年未检出B(Yamagata)型毒株;每年基本有两个流感流行季,分别是冬春季和夏季。结论年龄<15岁者是流感发病的主要人群,且在冬春季和夏季呈现流行高峰。2021—2023年以A(H1N1)型、A(H3N2)型、B(Victoria)型3种毒株交替流行为主。
Objective To understand the prevalence characteristics of influenza and changes of influenza virus strains,and provide reference for the prevention and control of influenza in the province.Methods Surveillance data about influenza in Hunan Province from 2014 to 2023 were exported from China Influenza Surveillance Information System.Differences in the percentage of influenza-like illness(ILI)cases(percentage of influenza-like cases[ILI%]in outpatient and emergency department visits)among different years and different populations,as well as the positive rate of influenza virus in ILI specimens were compared.Results From 2014 to 2023,over 2.65 million cases of ILI were reported,with an ILI%of 4.70%.ILI%among different years presented statistically significant differences(P<0.001).People aged 0-14 years old were the main population with ILI,accounting for 82.90%.The positive rate of influenza virus in ILI specimens was 14.14%,the positive rate of influenza virus among diffe-rent years and age groups were both significantly different(both P<0.001).The main prevalent influenza strains from 2014 to 2023 included types A(H1N1),A(H3N2),B(Victoria),and B(Yamagata),alternating among di-fferent years.However,type B(Yamagata)strains were not detected from 2020 to 2023.There were basically two influenza prevalence seasons every year,namely winter-spring and summer.Conclusion People<15 years old are the main population of influenza,and the prevalence peaks are in winter-spring and summer.From 2021 to 2023,the prevalence alternates mainly among 3 types:A(H1N1),A(H3N2),and B(Victoria).
作者
王小磊
黄超洋
孙倩莱
邓志红
黄一伟
赵善露
罗垲炜
任香
陈生宝
戴志辉
WANG Xiao-lei;HUANG Chao-yang;SUN Qian-lai;DENG Zhi-hong;HUANG Yi-wei;ZHAO Shan-lu;LUO Kai-wei;REN Xiang;CHEN Sheng-bao;DAI Zhi-hui(Hunan Provincial Center for Disease Control and Prevention,Changsha 410005,China)
出处
《中国感染控制杂志》
CAS
CSCD
北大核心
2024年第11期1413-1420,共8页
Chinese Journal of Infection Control
基金
湖南省疾病预防控制中心青荷基金项目(QHJJ2023010)
湖南省预防医学会决策咨询研究课题(2023jc001)。
关键词
流行性感冒
哨点监测
流感样病例
病原学
湖南省
influenza
sentinel surveillance
influenza-like illness
pathogenicity
Hunan Province
