Volume 28, Number 10—October 2022
Research
Shortening Duration of Swine Exhibitions to Reduce Risk for Zoonotic Transmission of Influenza A Virus
Dillon S. McBride, Jacqueline M. Nolting, Sarah W. Nelson, Michele M. Spurck, Nola T. Bliss, Eben Kenah, Susan C. Trock, and Andrew S. Bowman
Table 2
Number of county fairs sampled and number of fairs with swine testing positive for IAV, by categorical level at which the 72-hour recommendation was implemented, Ohio, Indiana, and Michigan, USA, 2018 and 2019*
| Categorical level of implementation of 72-hour recommendation | Total no. fairs | No. IAV-positive fairs | Mean estimated IAV prevalence, %† | p value‡ |
|---|---|---|---|---|
| No implementation | 144 | 26 | 40.9 | Referent |
| Some swine released | 38 | 10 | 33.2 | 0.3346 |
| All swine released | 13 | 3 | 6.1 | 0.0176 |
*Number of county fairs sampled and number of fairs that tested IAV-positive in 2018 and 2019 are shown by the categorical level at which the 72-hour recommendation was implemented. IAV, influenza A virus. †Mean estimated IAV prevalence among the IAV-positive county fairs was estimated by using virus isolation data. ‡By Dunn’s test. Pairwise comparisons were completed by using “no implementation” as the reference category.
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