Table 1.

Prevalence of serovar Dublin antibodies determined by two ELISAs with bulk milk samples of serovar Dublin-infected herds (n = 79) , control herds from The Netherlands (n = 125) , and control herds from the north of Sweden (n = 200)

Cutoff value (OD)LPS ELISAGP ELISA
Serovar Dublin-infected herdsControl herds, The NetherlandsControl herds, SwedenSerovar Dublin-infected herdsControl herds, The NetherlandsControl herds, Sweden
No.%No.%No.%No.%No.%No.%
0.15468.4118.8007696.25544.011557.5
0.24354.421.6006683.51713.65929.5
0.33544.321.6006278.5108.03216.0
0.43038.021.6005974.754.02010.0
0.52835.410.8005063.321.6115.5
0.62734.200004759.510.873.5
0.72227.800004050.610.873.5
0.81721.500003139.20042.0
0.91417.700002936.70031.5
1.01316.500002227.80021.0
1.11215.200002025.30010.5
1.21012.700001620.30000