中国人兽共患病学报2024，Vol.40Issue(9)：848-854,7.DOI:10.3969/j.issn.1002-2694.2024.00.129
2022-2023年江苏省H3N2流感病毒分子特征及耐药性分析
Molecular characteristics and drug resistance analysis of H3N2 influenza virus in Jiangsu Province from 2022 to 2023
摘要
Abstract
On the basis of the laboratory detection results of influenza viruses in Jiangsu Province from 2022 to 2023,this study was aimed at conducting a analysis of the genetic characteristics and resistance of the H3N2 influenza virus,and evalua-ting the effectiveness of vaccines and drugs.The full genome of 29 H3N2 isolates submitted by provincewide influenza surveil-lance network laboratories was amplified and sequenced.Phylogenetic trees of the HA and NA genes were constructed.The mutation characteristics of antigenic sites,glycosylation sites,and resistance sites were analyzed,and the influenza virus neura-minidase was detected with a fluorescence luminescence method.The homology of the 29 H3N2 isolates in Jiangsu Province was relatively high.The isolates belonged to the same evolutionary branch as domestic reference strains and the 2021-2022 vaccine strains,but were in different evolutionary branches from foreign reference strains and the 2022-2023 vaccine strains.Compared with the 2021-2022 vaccine strain A/Cambodia/e0826360/2020,the H3N2 influenza viruses isolated in Jiangsu Province during 2022-2023 had four amino acid substitutions in the HA protein and two amino acid substitutions in the NA protein.No changes in glycosylation sites,receptor-binding sites,and conserved amino acid residue regions were observed.IC50 analysis indicated that the 29 H3N2 isolates were not resistant to the antiviral drugs oseltamivir and zanamivir.The pre-dominant influenza viruses detected in Jiangsu Province during 2022-2023 were type A H3N2 influenza viruses.Monitoring of variations in HA and NA gene sites and influenza virus resistance aids in rapid understanding gene mutations,and can inform the selection of effective vaccine strains,and contribute to the prevention and control of influenza virus outbreaks.关键词
H3N2流感病毒/疫苗/药物/基因特征/进化分析Key words
H3N2 influenza virus/vaccines/medications/ge-netic characteristics/evolutionary analysis分类
医药卫生引用本文复制引用
邓斐,王慎骄,余慧燕,祁贤,朱立国,戴启刚..2022-2023年江苏省H3N2流感病毒分子特征及耐药性分析[J].中国人兽共患病学报,2024,40(9):848-854,7.基金项目
江苏省卫生健康委员会科研项目(No.M2020026) Supported by the Scientific Research Project of Jiangsu Provincial Health Commission(No.M2020026) （No.M2020026）
