TABLE 1.
Antimicrobial susceptibility test results for Helicobacter pylori isolates (n = 413)
| Antibiotic | No. (%) of isolates with an MIC (μg/ml) of: |
Total no. of isolates | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.06 | ≤0.25 | 0.5 | >0.5 | ≤1 | 1 | ≤2 | 2 | >2 | 4 | ≤8 | 8 | >8 | 16 | 32 | 64 | 128 | 256 | >256 | ||
| Amoxicillin | 405 (98.8) | 1 (0.2) | 2 (0.5) | 2 (0.5) | 410 | |||||||||||||||
| Ciprofloxacin | 190 (46.5) | 8 (2.0) | 211 (51.6) | 409 | ||||||||||||||||
| Clarithromycina | 114 (27.7) (S) | 8 (1.9) (I) | 290 (70.4) (R) | 412 | ||||||||||||||||
| Metronidazole | 58 (17.6) | 24 (7.3) | 66 (20.0) | 116 (35.2) | 63 (19.1) | 2 (0.6) | 1 (0.3) | 330 | ||||||||||||
| Tetracycline | 156 (38.1) | 246 (60.1) | 3 (0.7) | 4 (1.0) | 409 | |||||||||||||||
a
Clinical and Laboratory Standards Institute interpretive criteria exist only for clarithromycin; S, susceptible; I, intermediate; R, resistant.