TABLE 3.
Antimicrobial susceptibility comparison between H. influenzae strains isolated from CF patients and controls without CF
| Parameter | Result (no. of strains) for:
|
Pa | |
|---|---|---|---|
| Control isolates (188) | CF isolates (188) | ||
| Fully antibiotic susceptible | 88 | 50 | 0.006 |
| Chloramphenicol resistant | 23 | 36 | 0.12 |
| Ciprofloxacin MIC > 1 μg/mlb | 0 | 40 | <0.0001 |
| Amoxicillin-clavulanic acid resistant | 1 | 4 | 0.37 |
| Cotrimoxazole resistant | 68 | 123 | 0.001 |
| β-Lactamase positive | 38 | 45 | 0.54 |
| BLNAR | 1 | 10 | 0.01 |
| Resistant to 2 or more antimicrobials | 20 | 62 | <0.0001 |
a
Fisher's exact test.
b
The usual ciprofloxacin MIC for H. influenzae is ≤0.03 μg/ml (23).