Table 1 Antimicrobial resistance profiles of clinical E. coli isolates recovered from patients.
Drug class | Drug | MIC Resistance breakpoint µg/mL | Susceptible n (%) | Intermediate n (%) | Resistant n (%) |
|---|---|---|---|---|---|
Penicillins | Ampicillin (AMP) | > 32 | 6 (5.6) | – | 101 (94.4) |
Tetracyclines | Tetracycline (TET) | > 16 | 8 (7.5) | – | 99 (92.5) |
Folate Pathway antagonists | Sulfisoxazole (FIS) | > 512 | 7 (6.5) | 3 (2.8) | 97 (90.7) |
Trimethoprim/sulfamethoxazole (TMP/SMX) | > 4/76 | 12 (11.2) | – | 95 (88.8) | |
Quinolones | Ciprofloxacin (CIP) | > 1 | 15 (14.0) | 2 (2.0) | 90 (84.1) |
Nalidixic acid | > 32 | 9 (8.4) | 98 (91.6) | ||
Aminoglycosides | Gentamicin (GEN) | > 16 | 47 (43.9) | – | 60 (56.1) |
Phenicols | Chloramphenicol (CHL) | > 32 | 64 (59.8) | 14 (13.1) | 29 (27.1) |
B-lactam inhibitors | Amoxicillin-clavulanate (AMC) | > 32/16 | 37 (34.6) | 39 (36.5) | 31 (29.0) |
Cephem | Ceftriaxone (CRO) | > 4 | 21 (19.6) | – | 86 (80.4) |
Cefoxitin (FOX) | > 32 | 80 (74.8) | 8 (7.5) | 19 (17.8) | |
Carbapenems | Meropenem (MEM) | > 4 | 99 (92.5) | 8 (7.5) | |
Resistance to 3 or more classes of antibiotics | MDR | n/a | – | – | 102 (95.3) |
