Table II.
Resistance to individual antibiotics in major isolated Gram-negative bacteria
| Antibiotic | Escherichia coli | Pseudomonas spp. | Klebsiella spp. | Acinetobacter baumanii | ||||
|---|---|---|---|---|---|---|---|---|
| Ampicillin | 76.5% | (448) | - | - | - | |||
| Amoxicillin + clavulanate | 49.0% | (287) | - | 39.6% | (57) | - | ||
| Piperacillin + tazobactam | 18.4% | (108) | 31.1% | (52) | 18.8% | (27) | 91.8% | (101) |
| Cefoxitine | 31.9% | (187) | - | 29.2% | (42) | - | ||
| Cefuroxime | 47.1% | (276) | - | 35.4% | (51) | - | ||
| Ceftriaxone | 45.6% | (267) | - | 34.0% | (49) | - | ||
| Ceftazidime | 42.8% | (251) | 25.1% | (42) | 34.7% | (50) | 90.9% | (100) |
| Cefepime | 37.7% | (221) | 28.7% | (48) | 28.5% | (41) | 89.1% | (98) |
| Imipenem | 1.4% | (8) | 31.7% | (53) | 1.4% | (2) | 90.9% | (100) |
| Ertapenem | 2.7% | (16) | - | 2.8% | (4) | - | ||
| Gentamicin | 20.3% | (119) | 34.7% | (58) | 20.1% | (29) | 88.2% | (97) |
| Amikacin | 5.1% | (30) | 26.9% | (45) | 0.0% | (0) | 90.9% | (100) |
| Tobramycin | - | 22.8% | (38) | - | - | |||
| Ciprofloxacin | 48% | (281) | 34.1% | (57) | 31.2% | (45) | 92.7% | (102) |
| Tigecycline | 0.7% | (4) | - | 6.2% | (9) | 43.6% | (48) | |
| Aztreonam | 41.5% | (243) | 21.6% | (36) | 34% | (49) | - | |
| TMP-SMX | 47.8% | (280) | - | 45.8% | (66) | 93.6% | (103) | |
| Fosfomycin (urine) | 3.4% | (16) | - | 6.4% | (6) | - | ||
| Nitrofurantoine (urine) | 8.6% | (41) | - | 52.1% | (49) | - | ||
| Colistin | - | 0.6% | (1) | 0.0% | (0) | |||
The percentages represent the frequency of resistance. The numbers in brackets represent the count.