TABLE 1.
Results of antimicrobial susceptibility testing of 36 E. coli isolates from cases of meningitisa
| Antimicrobial |
E. coli isolates that were: |
|||||
|---|---|---|---|---|---|---|
| Susceptible |
Intermediate |
Resistant |
||||
| No. | % | No. | % | No. | % | |
| Amikacin | 32 | 89 | 1 | 4 | 3 | 8 |
| Gentamicin | 31 | 86 | NA | NA | 5 | 14 |
| Tobramycin | 31 | 86 | NA | NA | 5 | 14 |
| Chloramphenicol | 27 | 75 | 1 | 4 | 8 | 22 |
| Tetracycline | 15 | 42 | NA | NA | 21 | 58 |
| Nitrofurantoin | 35 | 97 | NA | NA | 1 | 3 |
| Ciprofloxacin | 31 | 86 | NA | NA | 5 | 14 |
| Levofloxacin | 32 | 89 | NA | NA | 4 | 11 |
| Piperacillin | 13 | 36 | 1 | 4 | 22 | 61 |
| Ampicillin-sulbactam | 17 | 47 | 5 | 19 | 14 | 39 |
| Piperacillin-tazobactam | 33 | 92 | 2 | 8 | 1 | 3 |
| Aztreonam | 30 | 83 | NA | NA | 6 | 17 |
| Cefazolin | 25 | 69 | 1 | 4 | 10 | 28 |
| Cefepime | 31 | 86 | NA | NA | 5 | 14 |
| Cefotaxime | 28 | 78 | 1 | 4 | 7 | 19 |
| Cefoxitin | 35 | 97 | 1 | 4 | 0 | 0 |
| Ceftazidime | 29 | 81 | NA | NA | 7 | 19 |
| Ceftriaxone | 28 | 78 | 1 | 4 | 7 | 19 |
| Cefuroxime | 28 | 78 | NA | NA | 8 | 22 |
| Cephalothin | 12 | 33 | 11 | 42 | 13 | 36 |
| Trimethoprim-sulfamethoxazole | 12 | 33 | NA | NA | 24 | 67 |
a
The categories marked with NA were not tested. Beta-lactam and beta-lactamase inhibitor combinations are ampicillin-sulbactam and piperacillin-tazobactam. Aztreonam is a monobactam. First-generation cephalosporins are cephalothin and cefazolin, second-generation cephalosporins include cefoxitin and cefuroxime, third-generation cephalosporins are cefotaxime and ceftazidime, and the fourth-generation cephalosporin is cefepime.