Table 1 Seroprevalence rate of PCV2 and S/P ratios in different herds in Shandong Province from 2015 to 2018
Year | Number of samples | Number of positive samples | SPR | Different Herds | ||||
|---|---|---|---|---|---|---|---|---|
Sows | Replacement pigs | Boars | Young piglets (< 100 d) | Fattening pigs (> 100 d) | ||||
2015 | 1257 | 1097 | 87.27% | 1.78 ± 0.04 | 1.79 ± 0.03 | 1.48 ± 0.01 | 0.97 ± 0.02 | 1.51 ± 0.07 |
2016 | 1850 | 1642 | 88.76% | 1.80 ± 0.02 | 1.43 ± 0.02 | 1.66 ± 0.02 | 1.01 ± 0.01 | 1.81 ± 0.05 |
2017 | 2121 | 1895 | 89.34% | 1.74 ± 0.02 | 1.61 ± 0.02 | 1.72 ± 0.03 | 1.03 ± 0.02 | 1.66 ± 0.04 |
2018 | 1758 | 1625 | 92.43% | 1.56 ± 0.01 | 1.47 ± 0.03 | 1.41 ± 0.01 | 0.91 ± 0.03 | 1.43 ± 0.03 |
Total | 6986 | 6259 | 89.59% | 1.77 ± 0.01 | 1.70 ± 0.02 | 1.68 ± 0.01 | 1.01 ± 0.02 | 1.55 ± 0.03 |