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To assess the performance of the drop test for polymyxin B resistance detection among Enterobacterales and non‐fermentative gram‐negative rods resistant to carbapenems. Seven hundred and fifteen carbapenem‐resistant isolates were tested: 628 Enterobacterales species and 87 non‐fermentative gram‐negative rods. For the polymyxin drop test, concentrations range from 0.25 to 8.0 µg/mL. Broth microdilution,...