Table 4.
Distribution (%) of antimicrobial minimum inhibitory concentrations of environmental Escherichia coli isolates (n = 1554) from veterinary hospitals.
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Antimicrobial abbreviations: AMC — amoxicillin-clavulanic acid, AMK — amikacin, AMP — ampicillin, CHL — chloramphenicol, CIP — ciprofloxacin, CRO — ceftriaxone, FOX — cefoxitin, GEN — gentamicin, KAN — kanamycin, NAL — nalidixic acid, SOX — sulfizoxazole, STR — streptomycin, SXT — trimethoprim-sulphamethoxazole, TIO — ceftiofur, TCY — tetracycline.
Minimum Inhibitory Concentration distribution: The unshaded fields indicate the MIC range tested for each antimicrobial in the plate configuration. The MICs at the upper or lower bound of the distribution are censored. The values at the upper bound are ≥ to the value presented and the values at the lower bound are ≤ the value presented.
Double bar represents the resistant breakpoint. Single bar represents the susceptible breakpoint.
Values in brackets are 95% confidence intervals. Total resistant may not equal values presented in table due to rounding error.
One sided 97.5% confidence interval.
Exact MIC.
Susceptible breakpoint-NAL: ≤ 16 μg/mL, Susceptible breakpoint-SOX: ≤ 256 μg/mL, Resistant breakpoint-SOX: ≤ 512 μg/mL, Susceptible breakpoint-STR: ≤ 32 μg/mL, Susceptible breakpoint-SXT: ≤ 2 μg/mL.