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- W3089589253 abstract "Abstract Background MDR bacterial infections are currently a serious problem for clinicians worldwide. Klebsiella pneumoniae and Enterobacter spp., among Enterobacteriaceae, and Pseudomonas aeruginosa, are part of the group of ESCAPE pathogens or bacteria that ‘escape’ from common antibacterial treatments. The lack of effectiveness of the first common line of antibiotics has led to the search for new therapies based on older antibiotics, such as colistin. Objectives We searched for new enhancers of the action of colistin against MDR Gram-negative bacteria that can be easily applicable to clinical treatments. Methods Colistin MICs were determined alone and with the protonophores CCCP, sodium benzoate, sodium salicylate and aspirin using the broth microdilution method and FIC indexes were calculated to assess synergy between colistin and each chemical. Time–kill assays of colistin with and without protonophores were performed to determine the bactericidal action of combinations of colistin with protonophores. Likewise, the effect of sucrose, l-arginine and l-glutamic acid on the MICs of colistin alone and combined with each protonophore was assessed. Results It was found that sodium benzoate, sodium salicylate and aspirin, at concentrations allowed for human and animal use, partially or totally reversed resistance to colistin in P. aeruginosa and highly resistant enterobacterial strains. The mechanism of action could be related to their negative charge at a physiological pH along with their lipid-soluble character. Conclusions Sodium benzoate, sodium salicylate and aspirin are good enhancers to use in antibiotic therapies that include colistin." @default.
- W3089589253 created "2020-10-08" @default.
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- W3089589253 date "2020-09-29" @default.
- W3089589253 modified "2023-10-17" @default.
- W3089589253 title "Aspirin, sodium benzoate and sodium salicylate reverse resistance to colistin in Enterobacteriaceae and<i>Pseudomonas aeruginosa</i>" @default.
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- W3089589253 doi "https://doi.org/10.1093/jac/dkaa371" @default.
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