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. 2021 Feb 18;59(3):e01870-20. doi: 10.1128/JCM.01870-20

TABLE 3.

Performance of challenge isolatesa

Test Total isolates, n EA, n EA, % Eval
 CA, n CA, % R, n Major, n Major, % Very major, n Very major, %
EA total, n EA, n EA, %
Vitek 2
 Automatic dilution 93 92 98.9 38 37 97.4 92 98.9 55 1 2.6 0 0
 Manual dilution 93 92 98.9 38 37 97.4 92 98.9 55 1 2.6 0 0
Vitek 2 COMPACT
 Manual dilution 93 92 98.9 38 37 97.4 92 98.9 55 1 2.6 0 0
a

CA, category agreement; EA, essential agreement (±1 doubling dilution); Eval, evaluable isolates; major, major discrepancies; n, number of isolates; R, resistant isolates; very major, very major discrepancies.