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Custom broth microdilution panel layout consisting of a chequerboard area and series of control dilutions.
AZA, aztreonam/avibactam; CAZ, ceftazidime; CZA, ceftazidime/avibactam; ATM, aztreonam; G, growth control well; S, sterility control well. Avibactam is kept constant at 4 mg/L when in combination and throughout the chequerboard.
