From: Economic Aspects of Disease Monitoring with Special Reference to Bovine Paratuberculosis
 | Percentiles | ||||
---|---|---|---|---|---|
Variable | Minimum | 5th | 50th | 95th | Maximum |
Number of infected herds in population | 20 | 37 | 48 | 60 | 75 |
Number of infected herds tested | 2 | 7 | 12 | 18 | 26 |
Number of animals tested/herd | 1 | 5 | 12 | 24 | 135 |
Number of infected animals/herd tested | 1 | 1 | 1 | 2 | 10 |
Number of infected animals/herd detected | 0 | 0 | 1 | 1 | 8 |
Number of infected herds detected | 0 | 2 | 6 | 11 | 21 |
Herd sensitivity (1 positive) | 0% | 18% | 50.5% | 83% | 100% |
Herd specificity (1 positive) | 91.8% | 92.4% | 93.0% | 93.5% | 94.2% |
Number of non-infected herds tested | 5974 | 5982 | 5988 | 5993 | 5998 |
Number of non-infected animals tested | 71688 | 71784 | 71856 | 71916 | 71976 |
Number of false positive herds | 339 | 381 | 413 | 445 | 486 |
False positive:true positive ratio | 18 | 36 | 70 | 215 | 486 |
Predictive value of positive herd test | 0.03% | 0.14% | 0.51% | 4.04% | 99.5% |
Predictive value of negative herd test | 99.2% | 99.7% | 99.8% | 99.9% | 99.99% |
Cost/infected herd detected (NOK) | 256,240 | 488,822 | 899,791 | 2,710,965 | 5,448,500 |