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Volume 31, Number 8—August 2025
Research
Transmission Dynamics of Highly Pathogenic Avian Influenza A(H5N1) and A(H5N6) Viruses in Wild Birds, South Korea, 2023–2024
Ye-Ram Seo1, Andrew Y. Cho1, Dong-Ju Kim1, Young-Jae Si, Hye-sung Jeong, Su-woong Lee, Chang-Seon Song, and Dong-Hun Lee
Table
Detailed information on highly pathogenic avian influenza A(H5N1) and A(H5N6) virus isolates from wild birds during 2023–2024 outbreak, in chronological order, South Korea
| No.† | Collection date | Sample ID | Region | Sample type | Host species | Subtype | Isolate ID |
|---|---|---|---|---|---|---|---|
| 1 | 2023 Nov 27 | 23WS022-22 | Jeollabuk-do | Captured | Eurasian wigeon | H5N1 | EPI_ISL_18717640 |
| 2 | 2023 Dec 1 | 23WC066 | Gyeongsangbuk-do | Carcass | Whooper swan | H5N1 | EPI_ISL_20051148 |
| 3 | 2023 Dec 2 | 23WC068 | Gyeongsangbuk-do | Carcass | Whooper swan | H5N1 | EPI_ISL_20051147 |
| 4 | 2023 Dec 4 | 23WC069 | Gyeongsangbuk-do | Carcass | Whooper swan | H5N1 | EPI_ISL_20051146 |
| 7 | 2023 Dec 8 | 23WC075 | Gyeongsangbuk-do | Carcass | Whooper swan | H5N6 | EPI_ISL_18853568 |
| 9 | 2023 Dec 19 | 23WF435 | Jeollabuk-do | Feces | Mandarin duck | H5N6 | EPI_ISL_18853569 |
| 10 | 2023 Dec 21 | 23WC111 | Gyeongsangbuk-do | Carcass | Bean goose | H5N6 | EPI_ISL_18853650 |
| 11 | 2023 Dec 22 | 23WC116 | Gyeongsangbuk-do | Carcass | Whooper swan | H5N6 | EPI_ISL_18853651 |
| 12 | 2023 Dec 22 | 23WC117 | Gyeongsangbuk-do | Carcass | Whooper swan | H5N1 | EPI_ISL_20051145 |
| 13 | 2024 Jan 10 | 23WC160 | Gyeongsangnam-do | Carcass | Bean goose | H5N6 | EPI_ISL_20051144 |
| 14 | 2024 Jan 10 | 23WS033-1 | Gwang-ju | Feces | Mandarin duck | H5N6 | EPI_ISL_20051143 |
| 16 | 2024 Jan 26 | 23WC195 | Jeju island | Carcass | Northern shoveler | H5N1 | EPI_ISL_20051142 |
| 17 | 2024 Jan 30 | 23WC215 | Jeju island | Carcass | Gadwall | H5N1 | EPI_ISL_20051141 |
| 18 | 2024 Feb 4 | 23WC224 | Gyeongsangbuk-do | Carcass | Peregrine falcon | H5N1 | EPI_ISL_20051140 |
| 19 | 2024 Feb 6 | 23WC229 | Gyeongsangnam-do | Carcass | Great cormorant | H5N6 | EPI_ISL_20051139 |
*ID, identification. †Indicates the order of occurrence among the 19 confirmed cases of highly pathogenic avian influenza A(H5N1) clade 2.3.4.4b identified in wild birds during November 2023–February 2024, of which 15 viruses were detected and isolated by National Institute of Wildlife Disease Control and Prevention.
1These first authors contributed equally to this article.
Page created: June 23, 2025
Page updated: July 09, 2025
Page reviewed: July 09, 2025
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