Table 3: 3rd generation cephalosporins antibiotic resistance pattern of isolated Enterobacteriaceae determined by disk diffusion (ESBL screening) test.
| Bacterial isolates | Cefotaxime | Aztreonam | Ceftazidime | Cefpodoxime |
| Resistant, n (%) | Resistant, n (%) | Resistant, n (%) | Resistant, n (%) | |
| E. coli (n = 45) | 37 (82.2%) | 38 (84.4%) | 30 (66.7%) | 16 (35.6%) |
| K. pneumoniae (n = 23) | 21 (91.3%) | 17 (73.9%) | 19 (82.6%) | 13 (56.5%) |
| P. mirabilis (n = 12) | 4 (33.3%) | 3 (25%) | 1 (8.3%) | 0 (0%) |
| E. aerogenes (n = 8) | 1 (12.5%) | 3 (37.5%) | 2 (25%) | 2 (25%) |
| K. oxytoca (n = 6) | 0 (0%) | 2 (33.3%) | 0 (0%) | 1 (16.7%) |
| S. marcescens (n = 6) | 2 (33.3%) | 2 (33.3%) | 3 (50%) | 1 (16.7%) |
| E. cloacae (n = 2) | 1 (50%) | 0 (0%) | 1 (50%) | 0 (0%) |
| C. freundii (n = 2) | 1 (50%) | 1 (50%) | 1 (50%) | 1 (50%) |
| Total (n = 104) | 67 (64.4%) | 66 (63.5%) | 57 (54.8%) | 34 (32.7%) |
*3rd GC: Third generation cephalosporins.