Table 1.
Assessment of H. pylori wild-type, lpxE, or cgt mutant strain susceptibility to polymyxin B and colistin by disk diffusion assaya
| Strain | Zone of inhibition (mm diam)b |
|
|---|---|---|
| Polymyxin B | Colistin (mm) | |
| Wild-type 26695 | 8 | 9 |
| 26695 lpxE | 21 | 27 |
| 26695 cgt | 10 | 15 |
a
H. pylori wild-type, lpxE, and cgt mutant strains were plated (∼108/ml) onto campylobacter blood agar plates along with filter paper disks (6 mm) containing 15 μl of polymyxin B (1.7 mg/ml) or colistin (10 mg/ml).
b
Values are representative of results for two to three experiments with similar outcomes.