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  • Title: Clinical experience with ceftazidime/avibactam for treatment of antibiotic-resistant organisms other than Klebsiella pneumoniae.
    Author: Santevecchi BA, Smith TT, MacVane SH.
    Journal: Int J Antimicrob Agents; 2018 Apr; 51(4):629-635. PubMed ID: 29408227.
    Abstract:
    BACKGROUND: Ceftazidime/avibactam is a newly approved β-lactam/β-lactamase inhibitor combination with activity against antibiotic-resistant Gram-negative organisms, including many carbapenem-resistant strains. Although this agent may offer a promising treatment option for serious infections with limited alternatives available, clinical experience with ceftazidime/avibactam in treatment of infections caused by multidrug-resistant Gram-negative organisms other than Klebsiella pneumoniae is limited. METHODS: A retrospective case series was performed to evaluate patients treated with ceftazidime/avibactam for infections caused by organisms other than K. pneumoniae at our institution over a 1-year period. Patients aged at least 18 years who received at least one dose of ceftazidime/avibactam were eligible for inclusion. Clinical and microbiological data were collected, and investigators assessed adverse effects, microbiological cure, clinical success, and 30-day in-hospital mortality following completion of ceftazidime/avibactam therapy. RESULTS: Ten patients were included. The most common index infection was pneumonia (n = 6/13, 46%) and the most frequently isolated organism was Pseudomonas aeruginosa (n = 8/21, 38%). Fifty percent of patients received ceftazidime/avibactam as monotherapy. Microbiological cure was achieved in 67% (n = 6/9) of patients and 70% (n = 7/10) of patients met criteria for clinical success. The 30-day in-hospital mortality rate was 30%. No patients experienced adverse events because of ceftazidime/avibactam therapy. CONCLUSIONS: For infections caused by antibiotic-resistant Gram-negative organisms other than K. pneumoniae, clinical and microbiological success rates for patients treated with ceftazidime/avibactam were similar to those that have been reported for K. pneumoniae. Ceftazidime/avibactam appears to be a promising treatment option for infections caused by a variety of resistant Gram-negative organisms when limited alternatives exist.
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