TABLE 3.
Discrepancy rates of false-susceptible and false-resistant isolates detected using proposed breakpoint criteria and an error rate-bounding method
| Organism (breakpoint [g/liter]) | MIC rangea | No. of isolates | No. (%) of discrepancies |
|
|---|---|---|---|---|
| Very major | Major | |||
| S. flexneri (≤8) | ≥R + 1 | 3 | 0 | NAb |
| R + S | 4 | 0 | 1 (25) | |
| ≤S + 1 | 191 | NA | 5 (2.6) | |
| Total | 198 | 0 | 6 (3.0) | |
| S. sonnei (≤16) | ≥R + 1 | 14 | 0 | NA |
| R + S | 2 | 0 | 0 | |
| ≤S + 1 | 292 | NA | 3 (1.0) | |
| Total | 308 | 0 | 3 (1.0) | |
a
R, nonsusceptible MIC; S, susceptible MIC; +1, +1 MIC dilution (according to CLSI guidelines).
b
NA, not applicable.