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Macrolide susceptibility among 6,382 H. influenzae isolates
| Drug | No. of strains
|
||
|---|---|---|---|
| Hypersusceptiblea | Baselineb | High-level resistantc | |
| Azithromycin | 113 (1.8%) | 6,187 (96.9%) | 82 (1.3%) |
| Clarithromycin | 37 (0.6%) | 6,185 (96.9%) | 160 (2.5%) |
Azithromycin MICs of <0.25 μg/ml; clarithromycin MICs of <2 μg/ml.
Azithromycin MICs of 0.25 to 4 μg/ml; clarithromycin MICs of 2 to 16 μg/ml.
Azithromycin MICs of >4 μg/ml; clarithromycin MICs of >16 μg/ml.
