Table 5 Summary of ELISA scores for herds sampled both before and during/after the year 2000
Herd | Year | No. of sera | ELISA score | |||||
|---|---|---|---|---|---|---|---|---|
0 | 1+ | 2+/3+ | 4+/5+ | % pos | Avg ELISA score | |||
Can-O | 1998 | 51 | 47 | 2 | 2 | 0 | 7.8 | 0.118 |
2001 | 82 | 75 | 4 | 1 | 2 | 8.5 | 0.195 | |
Can-P | 1994 | 126 | 120 | 4 | 2 | 0 | 4.8 | 0.071 |
2000 | 70 | 66 | 2 | 1 | 1 | 5.7 | 0.129 | |
US-W | 1997–1999 | 49 | 45 | 4 | 0 | 0 | 8.2 | 0.082 |
2000–2018 | 162 | 156 | 4 | 1 | 1 | 3.7 | 0.068 | |