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. 2016 Jan 28;54(2):423–427. doi: 10.1128/JCM.01840-15

TABLE 2.

Detection of non-ESBL-producing isolates using different tests

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a

+, color change from red to yellow/orange; −, no color change; H, hydrolysis of HMRZ-86; NH, no hydrolysis of HMRZ-86; NI, noninterpretable (color change to orange). An overall positive Rapid ESBL NDP test result corresponds to a positive result for CTX hydrolysis and a negative result when tazobactam (TZB) is added. The β-Lacta test is aimed to detect the activity of all broad-spectrum cephalosporinases. Shaded cells highlight the nonexpected results.