Combination of MexAB-OprM overexpression and mutations in efflux regulators, PBPs and chaperone proteins is responsible for ceftazidime/avibactam resistance in Pseudomonas aeruginosa clinical isolates from US hospitals

Abstract excerpt

OBJECTIVES: To evaluate ceftazidime/avibactam resistance mechanisms among Pseudomonas aeruginosa clinical isolates and compare with isolates susceptible to this combination. METHODS: During 2015, 2548 P. aeruginosa isolates were collected in 106 US hospitals and 46 (1.8%) were resistant to ceftazidime/avibactam. These isolates were matched with 109 ceftazidime/avibactam-susceptible isolates resistant to other...

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