From: Comparison of strategies for substantiating freedom from scrapie in a sheep flock
Population | Strategy | Qualification successes | |||
---|---|---|---|---|---|
 |  | Frequency (%) | Duration (years)a | Diagnostic testsa | Genotyping examsa |
Susceptible | A1 | 50/50 (100%) | 5.8 | 197 | 360 |
 | A2 | 5/50 (10%) | 8.8 | 0 | 464 |
 | B1 | 6/50 (12%) | 9.7 | 323 | 323 |
 | B2 | 0/50 (0%) |  |  |  |
 | C1 | 50/50 (100%) | 5.8 | 196 | 138 |
 | C2 | 0/50 (0%) |  |  |  |
Resistant | A1 | 47/50 (94%) | 4.1 | 140 | 300 |
 | A2 | 43/50 (86%) | 5.1 | 0 | 335 |
 | B1 | 0/50 (0%) |  |  |  |
 | B2 | 0/50 (0%) |  |  |  |
 | C1 | 47/50 (94%) | 4.2 | 141 | 106 |
 | C2 | 19/50 (38%) | 8.3 | 0 | 186 |