Volume 30, Number 8—August 2024
Dispatch
Characterization of Influenza D Virus Reassortant Strain in Swine from Mixed Pig and Beef Farm, France
Stéphane Gorin1, Gautier Richard1, Séverine Hervé, Eric Eveno, Yannick Blanchard, Agnès Jardin, Nicolas Rose, and Gaëlle Simon
Table
Hemagglutination inhibition test results for the detection of influenza D virus antibodies against D/swine/France/29-220655/2022 in serum sampled from pigs housed on a mixed pig and beef farm in France, December 2022*
| Growth stage, location | Age of pigs, wk | No. pigs sampled | HI titer range (mean)† | Positivity, % |
|---|---|---|---|---|
| Nursery, B1 | 10 | 10 | <10–20 | 10 |
| Fattening, B2 | 15 | 10 | <10–10 | 0 |
| Fattening, B2 | 25 | 10 | 20–160 (66) | 100 |
*B1, nursery barn; B2, primary fattening barn; HI, hemagglutination inhibition. †Positive threshold = 20.
1These first authors contributed equally to this article.
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