This work demonstrates a rapid platform that can determine the antimicrobial susceptibility testing (AST) in cation-adjusted Mueller-Hinton Broth medium, urine and blood by stimulated Raman scattering (SRS) imaging of deuterium oxide (D2O) incorporation at a single bacterium level. The total AST assay time with the value of the single-cell metabolism inactivation concentration (SC-MIC) obtained is less than 2.5 h from colony to results. The SC-MIC results of 37 sets of bacterial isolate samples were systematically validated by MIC determined by the Clinical and Laboratory Standards Institute criteria, with a category agreement of 94.6% and 5.4% minor error. Furthermore, SRS imaging of D2O metabolic incorporation can rapidly determine SC-MIC directly in clinical samples for urinary tract infection or septicemia blood infection.
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