Table 1.
Numbers of bacteria isolated from dairy cattle feces at a dairy farm in Texas.
Table 2.
Distribution of inhibition zone diameters of non-type-specific E. coli (n = 85) isolated on plain MacConkey agar (without antibiotic).
Table 3.
Distribution of inhibition zone diameters of presumptive third-generation cephalosporin resistant E. coli (n = 37) isolated on MacConkey agar supplemented with 1 μg/mL cefotaxime.
Table 4.
Distribution of inhibition zone diameters of presumptive quinolone resistant E. coli (n = 22) isolated on MacConkey agar supplemented with 0.5 μg/mL of ciprofloxacin.
Table 5.
Distribution of inhibition zone diameters of all E. coli isolates (n = 40) not susceptible to third-generation cephalosporins (i.e., second panel of antibiotics).
Fig 1.
Genetic determinants of antibiotic resistance among E. coli isolated from cattle feces on a dairy farm in Texas.
Black cells indicate the presence of a genetic resistance determinant and a phenotype of that determinant in a bacterial isolate. Purple cells indicate the presence of a genetic resistance determinant without a corresponding phenotype in the same isolate. White cells indicate the absence of both genetic resistance determinant and corresponding phenotype.