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Volume 31, Number 8—August 2025
Research Letter
Influenza D Virus in Domestic and Stray Cats, Northern China, 2024
Mingshuai Shen1, Xinkun Zhao1, Jian Zhang1, Cun Liu, Chengyi Qi, Ruohan Wang, Jieshi Yu, Kezhou Wang, and Zhao Wang
Table
Hemagglutination inhibition and virus neutralization antibody titers against influenza D virus in feline serum samples from study of influenza D virus in domestic and stray cats, northern China, 2024*
| Sample no. | Influenza A virus, A/China/SWL1304/2023(H1N1) |
Influenza B virus, B/Guangdong/266/2021 |
Influenza D virus, D/bovine/CHN/JY3002/2022 |
|||
|---|---|---|---|---|---|---|
| HI | HI | HI | VN | |||
| A5 | <10 | <10 | 10, 10 | 10, 10 | ||
| D5 | <10 | <10 | 20, 20 | 20, 20 | ||
| D8 | <10 | <10 | 20, 20 | 10, 10 | ||
| E3 | <10 | <10 | 10,10 | <10 | ||
| H1 | <10 | <10 | 40, 40 | 20, 20 | ||
| I3 | <10 | <10 | 20, 20 | 10, 10 | ||
| I6 | <10 | <10 | 10, 10 | <10 | ||
| L7 | <10 | <10 | 40, 40 | 20, 20 | ||
*Samples were tested against 3 strains: influenza A virus, influenza B virus, and influenza D virus. Titers below the detectable threshold (10) were indicated as <10 and considered negative. HI, hemagglutination inhibition; VN, virus neutralization.
1These authors contributed equally to this article.
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