TABLE 3.
Comparison of the LvI Δ117 PCR with PCR ribotypingc
| Assay | No. of samples includeda | Result | Ribotyping of cultured isolates (no.) |
Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | |
|---|---|---|---|---|---|---|---|---|
| Ribotype 027 | Non-027 ribotype | |||||||
| Δ117 PCR | 99 | + | 20 | 3b | 95.2 | 96.2 | 87.0 | 98.7 |
| − | 1 | 73 | ||||||
a
Only CYTGC-positive samples were included.
b
Three CYTGC-positive samples were typed as PCR ribotype 005, ribotype 106, and a rare ribotype (not 027).
c
All CYTGC-positive samples (n = 99) were analyzed by the Δ117 PCR. Sensitivity, specificity, negative predictive value (NPV), and positive predictive value (PPV) of the PCR method are given as percentages.