Table 3.
Determining of sensitivity, specificity, and efficiency of different Mycobacteria
| Determination of sensitivity and specificity | M. tuberculosis | M. avium subsp. Paratuberculosis | M. phlei | M. bovisBCG | M. bovisAN5 |
|---|---|---|---|---|---|
| True Positive (TP) | 5 | 2 | 4 | 4 | 7 |
| True Negative (TN) | 35 | 46 | 34 | 33 | 35 |
| False positives (FP) | 13 | 2 | 14 | 15 | 11 |
| False Negative (FN) | 1 | 4 | 2 | 2 | 1 |
| Sensitivity (%) | 83.33 | 33.33 | 66.66 | 66.66 | 87.5 |
| Specificity (%) | 72.91 | 95.83 | 70.83 | 68.75 | 76.08 |
| Positive predictive value (%) | 27.77 | 50 | 22.22 | 21.05 | 38.88 |
| Negative predictive value (%) | 97.22 | 92 | 94.44 | 94.28 | 97.22 |
| Efficiency (%) | 74.07 | 88.88 | 70.37 | 68.51 | 77.77 |
This table shows the calculation of sensitivity and specificity, positive and negative predictive values, and the efficiency of the studied livestock based on true positive and true negative and false-positive and false-negative results.