From: Disease Surveillance Strategies in Swine
Total no. of samples
No. of samples with antibodies (%)
No. of herds with a confirmed infection (%)
Elite breeding herds (n = 110)
7101
177 (2.5)
5 (4.5)
Multiplying herds (n = 79)
3078
156 (5.1)
6 (7.6)