Carbapenem Resistance Caused by High-Level Expression of OXA-663 β-Lactamase in an OmpK36-Deficient Klebsiella pneumoniae Clinical Isolate. Ma P, Laibinis HH, Ernst CM, Hung DT. Carbapenem Resistance Caused by High-Level Expression of OXA-663 β-Lactamase in an OmpK36-Deficient Klebsiella pneumoniae Clinical Isolate. Antimicrob Agents Chemother. 2018;62(11). doi:10.1128/AAC.01281-18 Read more