Table 3.
Antimicrobial susceptibility profiles of E coli isolates (n = 94) in the present study.
| Antimicrobial Agents | Susceptible (S) | Intermediate (I) | Resistance (R) | I + R | |||
|---|---|---|---|---|---|---|---|
| Number of Isolates | % | Number of Isolates | % | Number of Isolates | % | ||
| Penicillins | |||||||
| Ampicillin (AMP, 10 μg) | 79 | 84.04 | 6 | 6.38 | 9 | 9.57 | 15.96 |
| Amoxycillin/clavulanate (AMC, 20/10 µg) | 55 | 58.51 | 27 | 28.72 | 12 | 12.77 | 41.49 |
| Piperacillin/tazobactam (PTZ, 100/10 μg) | 72 | 76.60 | 14 | 14.89 | 8 | 8.51 | 23.40 |
| Aminoglycosides | |||||||
| Amikacin (AMK, 30 μg) | 58 | 61.70 | 19 | 20.21 | 17 | 18.09 | 38.30 |
| Gentamicin (GEN, 10 μg) | 60 | 73.17 | 20 | 26.83 | 14 | 17.07 | 43.90 |
| Cephalosporins | |||||||
| Cefuroxime (CFX, 30 μg) | 53 | 56.38 | 23 | 24.47 | 18 | 19.15 | 43.62 |
| Cefuroxime axetil (CFA, 30 μg) | 59 | 62.77 | 23 | 24.47 | 12 | 12.77 | 37.23 |
| Ceftriaxone (CTR, 30 μg) | 62 | 75.61 | 11 | 11.34 | 24 | 24.74 | 36.08 |
| Cefoperazone/sulbactam (CFS, 75/30 μg) | 53 | 56.38 | 30 | 31.91 | 11 | 11.70 | 43.62 |
| Cefepime (CFP, 30 μg) | 51 | 54.26 | 17 | 18.09 | 26 | 27.66 | 45.74 |
| Carbapenems | |||||||
| Ertapenem (ETP, 10 μg) | 62 | 65.96 | 23 | 24.47 | 9 | 9.57 | 34.04 |
| Imipenem (IMP, 10 μg) | 62 | 65.96 | 20 | 21.28 | 12 | 12.77 | 34.04 |
| Meropenem (MPM, 10 μg) | 63 | 67.02 | 22 | 23.40 | 9 | 9.57 | 32.98 |
| Tetracyclines | |||||||
| Tigecycline (TIG, 15 μg) | 9 | 9.57 | 14 | 14.89 | 71 | 75.53 | 90.43 |
| Quinolones & Fluoroquinolones | |||||||
| Ciprofloxacin (CIP, 5 μg) | 14 | 14.89 | 7 | 7.45 | 73 | 77.66 | 85.11 |
| Enrofloxacin (ENR, 10 μg) | 23 | 24.47 | 4 | 4.26 | 67 | 71.28 | 75.53 |
| Nalidixic acid (NAL, 30 μg) | 15 | 15.96 | 10 | 10.64 | 69 | 73.40 | 84.04 |
| Nitrofurans | |||||||
| Nitrofurantoin (NIT, 300 µg) | 58 | 61.70 | 17 | 18.09 | 19 | 20.21 | 38.30 |
| Polymyxins | |||||||
| Colistin (COL, 10 μg) | 3 | 3.19 | 8 | 8.51 | 83 | 88.30 | 96.81 |
| Folate Pathway Inhibitors | |||||||
| Trimethoprim/Sulfamethoxazole (SXT, 1.25/23.75 µg) |
9 | 9.57 | 13 | 13.83 | 72 | 76.60 | 90.43 |
% = percentage (number of isolates/total number of isolates tested). CLSI Zone Diameter Interpretive Criteria (mm).