TABLE 1.
Effect of selected cutoff points on ability of skin tests with PPDB and ESAT-6 to correctly identify tuberculosis- free and tuberculosis-infected cattle
| Cutoff value (mm) | % Test specificity for tuberculosis-free cattlea
|
% Test sensitivity for tuberculosis-infected cattleb
|
||
|---|---|---|---|---|
| PPDB | ESAT-6 | PPDB | ESAT-6 | |
| ≥3 | 70 | 100 | 100 | 81.8 |
| ≥4 | 90 | 100 | 86.4 | 77.3 |
| ≥5 | 90 | 100 | 81.8 | 63.6 |
a
Animals from M. bovis-free or environmentally sensitized sources (n = 10).
b
Animals naturally or experimentally infected with M. bovis (n = 22).