Antibiotic resistance — China
Summary
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Background
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Until now, polymyxin resistance has involved chromosomal mutations but has never been reported via horizontal gene transfer. During a routine surveillance project on antimicrobial resistance in commensal _Escherichia coli_ from food animals in China, a major increase of colistin resistance was observed. When an _E. coli_ strain, SHP45, possessing colistin resistance that could be transferred to another strain, was isolated from a pig, we
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