TABLE 1.
Association between infection in badgers and result of blood test or presence of lesions
| Test (no. tested) | Infecteda badgers (55 examined) |
Uninfected badgers (398 examined) |
Relative riskb | P value | ||||
|---|---|---|---|---|---|---|---|---|
| No. negative | No. positive | Sensitivity (%) | No. positive | No. negative | Specificity (%) | |||
| Brock TB Stat-Pak (374) | 24 | 13 | 35 | 4 | 333 | 99 | 11 | <0.0001 |
| Presence of any lesion (453) | 34 | 21 | 38 | 65 | 333 | 84 | 3 | <0.003 |
a
As determined by positive culture confirmed by spoligotyping/VNTR (n = 55) only. Six badgers with AFB present histologically but from which no positive culture was obtained were discounted from the analysis as having ambiguous disease status.
b
Proportion of test-positive animals that were infected divided by the proportion of test-negative animals that were infected.