Table 4 Seroprevalence of APPV in pig farms of different years in China by the E2-iELISA
Year | Total sample | No. of positive | Prevalence (%) |
|---|---|---|---|
2017 | 430 | 265 | 61.63 |
2018 | 400 | 294 | 73.50 |
2019 | 184 | 154 | 83.70 |
2020 | 166 | 130 | 78.31 |
2021 | 188 | 168 | 89.36 |
Total | 1368 | 1011 | 73.90 |