Table 2.
Comparison of different diagnostic test combinations for the diagnosis of Johne's disease.
| Sample size | Test combinations | Combinations of tests (%) | ||||
|---|---|---|---|---|---|---|
| A | B | A+ & B+ (TP) | A− & B+ (FN) | A+ & B− (FP) | A− & B− (TN) | |
| 204 | Serum ELISA | Milk ELISA | 16 (7.8) | 18 (18.8) | 22 (10.8) | 148 (72.6) |
| 68 | Faecal Microscopy | Faecal PCR | 21 (30.9) | 10 (14.7) | 16 (23.5) | 21 (30.9) |
| 207 | Milk PCR | Milk ELISA | 23 (11.1) | 6 (2.9) | 11 (5.3) | 167 (80.7) |
| 62 | Serum ELISA | Fecal PCR | 25 (40.3) | 5 (8.1) | 5 (8.1) | 27 (43.5) |
TP: positive in A and B, TN: negative in A and B, FP: positive in A and negative in B, and FN: negative in A and positive in B.