Table 9 Sensitivity, specificity and accuracy of the 4 Widal brand for anti-H 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
Widal Brand | sensitivity | specificity | accuracy |
|---|---|---|---|
Using a cut-off 1/80 | |||
Remel | 94.02% | 8.33% | 71.42% |
Biosystems | 91.04% | 16.66% | 71.42% |
Biotech | 86.56% | 20.83% | 69.23% |
Dialab | 73.13% | 45.83% | 65.93% |
Using a cut-off 1/160 | |||
Remel | 83.58% | 20.83% | 67.03% |
Biosystems | 80.59% | 29.16% | 67.03% |
Biotech | 73.13% | 54.16% | 68.13% |
Dialab | 55.22% | 91.66% | 64.83% |
Using a cut-off 1/320 | |||
Remel | 56.71% | 79.16% | 62.63% |
Biosystems | 47.76% | 74.07% | 57.14% |
Biotech | 35.82% | 91.66% | 50.54% |
Dialab | 19.40% | 100.00% | 40.65% |