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Table 1 Seroprevalence rate of PCV2 and S/P ratios in different herds in Shandong Province from 2015 to 2018

From: Epidemiological investigation of porcine circovirus type 2 and its coinfection rate in Shandong province in China 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