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Volume 29, Number 7—July 2023
Research

Highly Pathogenic Avian Influenza Virus (H5N1) Clade 2.3.4.4b Introduced by Wild Birds, China, 2021

Jingman Tian1, Xiaoli Bai1, Minghui Li1, Xianying Zeng1, Jia Xu, Peng Li, Miao Wang, Xingdong Song, Zhiguo Zhao, Guobin Tian, Liling Liu, Yuntao Guan, Yanbing LiComments to Author , and Hualan ChenComments to Author 
Author affiliations: State Key Laboratory for Animal Didease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China (J. Tian, X. Bai, M. Li, X. Zeng, X. Song, Z. Zhao, G. Tian, L. Liu, Y. Guan, Y Li, H. Chen); Preventive and Control Center for Animal Disease of Heilongjiang Province, Harbin (J. Xu, P. Li, M. Wang)

Main Article

Table

Avian influenza viruses isolated from wild bird samples collected in China, January 2020–December 2021*

Date Province Sample
 Virus
Feces Swab Tissue No. strains Subtype Pathotype†
2020
Jan Shanxi 700 0 0 2 H5N3 Low
Jan Heilongjiang 980 394 2 0 NA NA
Nov Anhui 1,017 0 0 17 Multiple‡ Low
Nov
Ningxia
 600
 0
 4
1
 H5N2
 Low
2021
Mar Anhui 700 0 0 0 NA NA
Mar Liaoning 600 0 0 0 NA NA
Apr Ningxia 450 0 0 0 NA NA
Apr Heilongjiang 750 0 0 0 NA NA
Oct Heilongjiang 324 113 0 2 H5N1 High
Dec Shanxi 500 0 0 4 H5N1 High
Dec Henan 800 0 0 11 H5N1 High

*NA, not applicable. †Pathotype is determined by the cleavage motif of its hemagglutinin gene. ‡The 17 low pathogenicity viruses are 1 H2N3, 1 H3N8, 9 H4N6, 3 H5N8, 1 H6N2, 1 H6N8, and 1 H12N2 strains.

Main Article

1These authors contributed equally to this article.

Page created: May 21, 2023
Page updated: June 20, 2023
Page reviewed: June 20, 2023
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