Genetic characteristics of the mcr-1-positive plasmid identified in this study. (A) Comparison with similar plasmids from pathogenic bacteria in humans or other animals. (B) The genetic contexts of the resistance genes are magnified under the circle graph. The arrows and triangles represent genes from different functional categories (red: resistance genes, dark blue: mobile elements, orange: replication, green: conjugation transfer, light blue: type IV secretion components, gray: other functional genes). The corresponding alignments are shown in light blue.