TABLE 2.
Relative sensitivities of the DIT for BCG-vaccinated M. bovis-infected animals under different testing scenarios
| Scenario | Testa | No. positive/total | % sensitivity (95% CI) |
|---|---|---|---|
| Serial testing | B-A | 83/89 | 93.3 (85.9–97.5) |
| DIT | 86/89 | 96.6 (90.5–99.3) | |
| Standalone testing | B-A | 64/73 | 87.7 (77.9–94.2) |
| DIT | 53/73 | 72.6 (60.9–82.4)b |
a
For B-A, the test is positive if the ΔOD for PPDB − PPDA is >0.1. For DIT, the test is positive if the ΔOD for ESAT-6–CFP-10 − nil and/or Rv3615c − nil is >0.1.
b
P < 0.0001 by Fisher's exact test (compared to the serial testing scenario).