Table 5. ELISA-based testing strategies and their NPV distribution and number of second-order dominated strategies for each mastitis scenario.
Results are for a 20% initial MAP prevalence in a 1,000 head herd.
| Mastitis Association (MA) | No Mastitis Association (NMA) | No Mastitis (NM) | ||||
|---|---|---|---|---|---|---|
| median NPV (range), x106 | SOSD | median NPV (range), x106 | SOSD | median NPV (range), x106 | SOSD | |
| No control | 20.36 (16.76,23.63) | 5 | 20.55 (16.99,23.85) | 11 | 21.08 (14.59,26.41) | 1 |
| Annual ELISA, cull all | 17.97 (13.44,21.79) | 0 | 18.29 (12.74,22.02) | 0 | 18.4 (10.95,23.13) | 0 |
| Annual ELISA, cull high | 20.25 (15.97,24.97) | 2 | 20.15 (15.21,23.74) | 1 | 20.5 (16.07,24.86) | 2 |
| Annual ELISA, cull after 2 | 19.85 (17.14,23.82) | 4 | 19.75 (15.52,24.48) | 1 | 20.28 (17.22,23.36) | 3 |
| Biannual ELISA, cull all | 19.95 (16.74,24.52) | 2 | 19.96 (16.92,23.39) | 3 | 20.58 (15.72,24.79) | 1 |
| Biannual ELISA, cull high | 19.77 (16.18,23.43) | 1 | 19.84 (16.33,23.13) | 1 | 20.43 (16.59,23.12) | 2 |
| Biannual ELISA, cull after 2 | 19.69 (16.53,22.88) | 1 | 20.43 (16.35,23.76) | 5 | 20.11 (16.33,24.7) | 2 |
| Cont. annual ELISA, cull all | 19.94 (16.69,23.82) | 6 | 20.13 (15.92,24.22) | 2 | 20.45 (16.19,24.51) | 3 |
| Cont. annual ELISA, cull high | 20.40 (16.65,23.66) | 6 | 20.56 (16.06,23.69) | 5 | 20.57 (17.43,24.02) | 8 |
| Cont. annual ELISA, cull after 2 | 20.17 (16.69,23.79) | 4 | 20.46 (16.76,24.22) | 6 | 20.55 (16.95,24.85) | 6 |
| Cont. biannual ELISA, cull all | 20.02 (17.53,24.17) | 4 | 19.89 (16.52,23.81) | 1 | 20.14 (15.9,23.58) | 1 |
| Cont. biannual ELISA, cull high | 20.16 (16.35,23.74) | 3 | 20.02 (16.17,24.6) | 1 | 20.41 (17.62,24.56) | 6 |
| Cont. biannual ELISA, cull after 2 | 20.21 (15.48,23.64) | 1 | 20.20 (15.84,24.22) | 3 | 20.05 (16.7,23.99) | 1 |
SOSD is the number of strategies (of the 13 presented) second-order dominated.