Table 5.
Sensitivity, specificity and accuracy of the 4 Widal brand for anti-O antibodies of 91 random serum samples of the 150 clinically diagnosed typhoid fever cases using IgM anti-LPS ELISA as a reference test at three cut-off values
| Using a cut-off 1/80 | |||
|---|---|---|---|
| Brand | sensitivity | specificity | accuracy |
| Remel | 100.00% | 54.16% | 87.91% |
| Biosystems | 100.00% | 58.33% | 89.01% |
| Biotech | 97.00% | 58.33% | 86.81% |
| Dialab | 88.10% | 91.66% | 89.01% |
| Using a cut-off 1/160 | |||
| Remel | 89.50% | 83.33% | 87.91% |
| Biosystems | 83.58% | 95.83% | 86.81% |
| Biotech | 80.59% | 83.33% | 81.31% |
| Dialab | 47.76% | 95.83% | 60.40% |
| Using a cut-off1/320 | |||
| Remel | 59.70% | 100.00% | 70.32% |
| Biosystems | 46.26% | 100.00% | 60.43% |
| Biotech | 35.82% | 100.00% | 52.74% |
| Dialab | 2.89% | 100.00% | 28.57% |