TABLE 2.
Method | Sensitivity (%) | Specificity (%) | Positive predictive value (%) | Negative predictive value (%) |
---|---|---|---|---|
ELISA alonea | 82.4 | 100.0 | 100.0 | 99.4 |
ELISA-RA | ||||
All EHECa | 76.5 | 100.0 | 100.0 | 99.2 |
O157b | 100.0 | 100.0 | 100.0 | 100.0 |
SMAC | ||||
All EHECa | 23.5 | 100.0 | 100.0 | 97.3 |
O157b | 50.0 | 100.0 | 100.0 | 99.2 |
n = 488.
n = 479 (the three PCR-positive–culture-negative samples and the six non-O157:H7 culture-positive samples were deleted from this data set).