TABLE 5.
Proportion of false-susceptible and false-resistant results for proposed azithromycin MIC breakpoints
| Organism (susceptibility breakpoint [μg/ml]) | MIC rangea | No. of isolates | No. of discrepancies (discrepancy rate [%]) |
|
|---|---|---|---|---|
| Very major | Major | |||
| Typhi (≤16) | ≥R + 1 | 1 | 0 | NAb |
| R + S | 191 | 3 (1.6) | 1 (0.5) | |
| ≤S + 1 | 870 | NA | 4 (0.5) | |
| Total | 1,062 | 3 (0.3) | 5 (0.5) | |
| Paratyphi A (≤32) | ≥R + 1 | 0 | 0 | NA |
| R + S | 23 | 4 (17.4) | 1 (4.3) | |
| ≤S + 1 | 133 | NA | 5 (3.8) | |
| Total | 156 | 4 (2.6) | 6 (3.8) | |
a
S, susceptible MIC; R, nonsusceptible MIC.
b
NA, not applicable.