Table 1. Comparison of agreement & error rates between QMAC-dRAST and Vitek 2* before and after AST algorithm optimization

Ann Clin Microbiol 2022;25:109-118. Clinical usefulness of the QMAC-dRAST system for AmpC β-lactamase-producing Enterobacterales

Table 1. Comparison of agreement & error rates between QMAC-dRAST and Vitek 2* before and after AST algorithm optimization

Bacterial species	No. of AST results	Before algorithm optimization (%)				After algorithm optimization (%)
Bacterial species	No. of AST results	CA	VME	ME	mE	CA	VME	ME	mE
M. morganii	120	67.5	25.8	17.9	17.5	79.2	0	7.1	15.8
S. marcescens	120	42.5	0	55.6	11.7	88.3	16.7	1.9	8.3
Total	240	55.4	19.1	38.3	14.6	83.8	5.4	4.3	12.1

*For results showing discrepancies between QMAC-dRAST and Vitek 2, broth microdilution test results were used as the reference AST results to resolve discrepancies. Abbreviations: AST, antimicrobial susceptibility testing; CA, categorical agreement; VME, very major error; ME, major error; mE, minor error.