TABLE 3.
Senstivity, specificity, positive predictive value, negative predictive value, and 95% confidence intervals of rapid diagnostic assays for typhoid fever
| Assaya | No. of samples/total no. of samples, % (95% confidence interval)
|
|||
|---|---|---|---|---|
| Sensitivity | Specificity | Positive predictive value | Negative predictive value | |
| Multi-Test Dip-S-Ticks for Serotype Typhi | 51/57, 89 (78-96) | 9/18, 50 (27-73) | 51/60, 85 (73-93) | 9/15, 60 (33-83) |
| TyphiDot | 46/58, 79 (66-88) | 17/19, 89 (66-98) | 46/48, 96 (85-99) | 17/29, 59 (39-76) |
| TUBEX | 43/55, 78 (65-88) | 17/18, 94 (71-100) | 43/44, 98 (87-100) | 17/29, 59 (39-76) |
| Widal testing in the hospitalb | 30/47, 64 (49-77) | 13/17, 76 (50-92) | 30/34, 88 (72-96) | 13/30, 43 (26-62) |
| Widal testing at the Pasteur Institute | 33/54, 61 (47-74) | 19/19, 100 (79-100) | 33/33, 100 (87-100) | 19/40, 48 (32-64) |
a
Widal, TO or TH agglutinin ≥100.
b
At any time during hospitalization.