| Number of positive sera by ELISA | Number of negative sera by ELISA | P value | ||||||
---|---|---|---|---|---|---|---|---|---|
 | (n = 248) | (n = 50, randomly selected) |  | ||||||
 | positive | negative | positive | negative | (Among serum samples) | ||||
 | n | % | n | % | n | % | n | % |  |
com-IgG Kit | 211 | 85.1 | 37 | 14.9 | 1 | 2 | 49 | 98 | P < 0.01 |
com-IgM Kit | 108 | 43.5 | 140 | 56.5 | 0 | 0 | 50 | 100 | |
WB-RH | 178 | 71.7 | 70 | 28.3 | 1 | 2 | 49 | 98 | |
WB-ME49 | 202 | 81.5 | 46 | 18.5 | 5 | 10 | 45 | 90 | P < 0.05 |