Volume 28, Number 10—October 2022
Shortening Duration of Swine Exhibitions to Reduce Risk for Zoonotic Transmission of Influenza A Virus
|Categorical level of implementation of 72-hour recommendation||Total no. fairs||No. IAV-positive fairs||Mean estimated IAV prevalence, %†||p value‡|
|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.