From: Seroprevalence of Lawsonia intracellularis antibodies in intensive pig farms in China
Age class | Number of pigs# | Prevalence (95% CI)†| ||
---|---|---|---|---|
 | Positive | Tested | Apparent | True |
Pre-weaning | 47 | 147 | 32 (14 to 50) | 38 (19 to 57)a |
Weaners | 58 | 221 | 26 (12 to 40) | 29 (15 to 44)b,c,d |
Fattening | 166 | 279 | 60 (46 to 73) | 81 (69 to 92)a,b,e,f |
Sows | 186 | 255 | 73 (60 to 86) | 100 (100 to 100)a,c,e |
Boars | 145 | 158 | 92 (81 to 100) | 100 (100 to 100)a,d,f |
Total | 602 | 1060 | 57 (50 to 64) | 77 (66 to 87) |