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- W2896520822 abstract "The emergence of NDM- and MCR-1-co-producing Escherichia coli has compromised the use of carbapenems and colistin, which are critically important in clinical therapy, and represents a severe threat to public health worldwide. Here, we demonstrate synergism of colistin combined with existing antibiotics as a potential strategy to overcome XDR E. coli co-harbouring NDM and MCR-1 genes. To comprehensively evaluate their combined activity, antibiotic combinations were tested against 34 different E. coli strains carrying both NDM and MCR-1 genes. Antibiotic resistance profiles and molecular characteristics were investigated by susceptibility testing, PCR, MLST, S1-PFGE and WGS. Antibiotic synergistic efficacy was evaluated through in vitro chequerboard experiments and dose–response assays. A mouse model was used to confirm active combination therapies. Additionally, combinations were tested for their ability to prevent high-level colistin-resistant mutants (HLCRMs). Combinations of colistin with rifampicin, rifabutin and minocycline showed synergistic activity against 34 XDR NDM- and MCR-1-co-producing E. coli strains, restoring, in part, susceptibility to both colistin and the partnering antibiotics. The therapeutic effectiveness of colistin combined with rifampicin or minocycline was demonstrated in a mouse model. Furthermore, colistin plus rifampicin showed significant activity in preventing the occurrence of HLCRMs. The synergism of colistin in combinations with rifampicin, rifabutin or minocycline offers viable therapeutic alternatives against XDR NDM- and MCR-positive E. coli." @default.
- W2896520822 created "2018-10-26" @default.
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- W2896520822 date "2018-10-20" @default.
- W2896520822 modified "2023-09-26" @default.
- W2896520822 title "Novel partners with colistin to increase its in vivo therapeutic effectiveness and prevent the occurrence of colistin resistance in NDM- and MCR-co-producing Escherichia coli in a murine infection model" @default.
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- W2896520822 doi "https://doi.org/10.1093/jac/dky413" @default.
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