Method | Molecular tools | Sensitivity | Specificity | ||
---|---|---|---|---|---|
Positive | Negative | ||||
Microscopy | Positive | 92 | 0 | 85.5% | 100% |
Negative | 12 | 90 | (80.7-93.9%) | (96.0-100.0%) | |
Total | 104 | 90 |
Age group (days) | Total no. of samples | ||||
---|---|---|---|---|---|
No. positive (%) | χ2 | p | |||
Early pre-weaned calves (≤ 15) | 158 | 89 (56.3) | 2.535 | 0.139 | |
Pre-weaned calves (15-40) | 36 | 15 (41.7) | |||
Total | 194 | 104 (53.6) |