TABLE 3.

Senstivity, specificity, positive predictive value, negative predictive value, and 95% confidence intervals of rapid diagnostic assays for typhoid fever

AssayaNo. of samples/total no. of samples, % (95% confidence interval)
SensitivitySpecificityPositive predictive valueNegative predictive value
Multi-Test Dip-S-Ticks for Serotype Typhi51/57, 89 (78-96)9/18, 50 (27-73)51/60, 85 (73-93)9/15, 60 (33-83)
TyphiDot46/58, 79 (66-88)17/19, 89 (66-98)46/48, 96 (85-99)17/29, 59 (39-76)
TUBEX43/55, 78 (65-88)17/18, 94 (71-100)43/44, 98 (87-100)17/29, 59 (39-76)
Widal testing in the hospitalb30/47, 64 (49-77)13/17, 76 (50-92)30/34, 88 (72-96)13/30, 43 (26-62)
Widal testing at the Pasteur Institute33/54, 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.