Figure 2

The resistant phenotype patterns of E. coli isolates from black bears. (A) The 0 on the x-axis means the strains were sensitive to all antibiotics tested and 1–5 means the strains resistant to 1–5 categories of antibiotics, respectively. The bars indicating that 62 E. coli isolates (62/142, 43.7%) are MDR. (B) Color bars demonstrating the distribution of resistant phenotype patterns in E. coli isolates from black bears and only MDR isolates were analyzed (n = 62). By using disk diffusion assay, a total of 40 resistant patterns were observed in MDR E. coli strains.