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MIC distribution of isolates carrying a blaCTX-M gene. (A) CTX ECOFF, ≤0.25 mg/liter; S, ≤1 mg/liter; R, >2 mg/liter. (B) CAZ ECOFF, ≤0.5 mg/liter; S, ≤1 mg/liter; R, >4 mg/liter. (C) ETP ECOFF, ≤0.064 mg/liter; S, ≤0.5 mg/liter; R, >1 mg/liter. In parentheses is the number of isolates tested. Black rectangle, isolates analyzed for mutations in OmpC/K36.
