Emerg Infect Dis. 2022 Oct;28(10):2035-2042. doi: 10.3201/eid2810.220649. Epub 2022 Sep 9.
Reducing zoonotic influenza A virus (IAV) risk in the United States necessitates mitigation of IAV in exhibition swine. We evaluated the effectiveness of shortening swine exhibitions to <72 hours to reduce IAV risk. We longitudinally sampled every pig daily for the full duration of 16 county fairs during 2014-2015 (39,768 nasal wipes from 6,768 pigs). In addition, we estimated IAV prevalence at 195 fairs during 2018-2019 to test the hypothesis that <72-hour swine exhibitions would have lower IAV prevalence. In both studies, we found that shortening duration drastically reduces IAV prevalence in exhibition swine at county fairs. Reduction of viral load in the barn within a county fair is critical to reduce the risk for interspecies IAV transmission and pandemic potential. Therefore, we encourage fair organizers to shorten swine shows to protect the health of both animals and humans.
为降低美国的人畜共患流感病毒 (IAV) 风险，需要减少展览猪中的 IAV。我们评估了将猪的展览时间缩短至<72 小时以降低 IAV 风险的效果。我们在 2014-2015 年的 16 个县集市期间，对每头猪进行了为期 16 天的纵向采样（来自 6768 头猪的 39768 个鼻拭子）。此外，我们在 2018-2019 年期间对 195 个集市的 IAV 流行率进行了估计，以检验<72 小时的猪展览将具有较低的 IAV 流行率的假设。在这两项研究中，我们发现缩短展览时间可极大降低县集市中展览猪的 IAV 流行率。减少县集市中猪舍内的病毒载量对于降低种间 IAV 传播和大流行潜力的风险至关重要。因此，我们鼓励集市组织者缩短猪的展览时间，以保护动物和人类的健康。
