This retrospective investigation (2019–2022) identified two plasmid-mediated mcr-10 from 6800 food samples in Shanghai, China and localized in a conjugative plasmid (pEC1918-mcr10) in Escherichia kobei from ready-to-eat food with high-level polymyxin B resistance, and a nonconjugative plasmid (pEC2001–mcr10) in E. coli from chicken. These genes were adjacent to ISEc36. This report highlights the emergence of mcr-10 from food samples in Shanghai, China. Active surveillance of vital resistance genes along food production chain should be performed.
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