Table 5: Distribution of MICs (μg/ml) among 50 MDR E.coli isolates.

Antibiotic No.(%)
Susceptible
Isolates
No. (%) Resistance
Isolates
MIC50 MIC90 MIC Range Breakpoints for Susceptible
Ceftazidime 13 (26) 37 (74) 2.62 4.72 0.016 – 256 ≤ 4
Ciprofloxacin 5 (10) 45 (90) 1.38 2.49 0.002 – 32 ≤ 1
Imipenem 49 (98) 1 (2) 0.019 0.034 0.002– 32 ≤ 1
Cefuroxime 3 (6) 47 (94) 10.59 19.07 0.016 – 256 ≤ 4