The in vitro activity of WCK 5222 (cefepime-zidebactam) was compared to that of several available combination therapies among 30 clinical carbapenem-resistant Pseudomonas aeruginosa (CRP) strains using gradient diffusion strips. The… Click to show full abstract
The in vitro activity of WCK 5222 (cefepime-zidebactam) was compared to that of several available combination therapies among 30 clinical carbapenem-resistant Pseudomonas aeruginosa (CRP) strains using gradient diffusion strips. The combinations included nonsusceptible β-lactams (cefepime, ceftolozane-tazobactam, and meropenem) with amikacin and fosfomycin. ABSTRACT The in vitro activity of WCK 5222 (cefepime-zidebactam) was compared to that of several available combination therapies among 30 clinical carbapenem-resistant Pseudomonas aeruginosa (CRP) strains using gradient diffusion strips. The combinations included nonsusceptible β-lactams (cefepime, ceftolozane-tazobactam, and meropenem) with amikacin and fosfomycin. WCK 5222 MICs ranged from 2 to 32 mg/liter, and 97% were ≤16 mg/liter, while 105/146 (72%) combinations demonstrated inhibition below established susceptibility breakpoints. WCK 5222 monotherapy may be preferred over the combinations assessed for CRP infections.
               
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