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  • Title: Safety and Efficacy of Ceftazidime-Avibactam in the Treatment of Children ≥3 Months to <18 Years With Complicated Urinary Tract Infection: Results from a Phase 2 Randomized, Controlled Trial.
    Author: Bradley JS, Roilides E, Broadhurst H, Cheng K, Huang LM, MasCasullo V, Newell P, Stone GG, Tawadrous M, Wajsbrot D, Yates K, Gardner A.
    Journal: Pediatr Infect Dis J; 2019 Sep; 38(9):920-928. PubMed ID: 31335570.
    Abstract:
    BACKGROUND: Ceftazidime-avibactam is effective and well tolerated in adults with complicated urinary tract infection (cUTI), but has not been evaluated in children with cUTI. METHODS: This single-blind, multicenter, active-controlled, phase 2 study (NCT02497781) randomized children ≥3 months to <18 years with cUTI (3:1) to receive intravenous (IV) ceftazidime-avibactam or cefepime for ≥72 hours, with subsequent optional oral switch. Total treatment duration was 7-14 days. Primary objective was assessment of safety. Secondary objectives included descriptive efficacy and pharmacokinetics. A blinded observer determined adverse event (AE) causality and clinical outcomes up to the late follow-up visit (20-36 days after the last dose of IV/oral therapy). RESULTS: In total, 95 children received ≥1 dose of IV study drug (ceftazidime-avibactam, n = 67; cefepime, n = 28). The predominant baseline Gram-negative uropathogen was Escherichia coli (92.2%). AEs occurred in 53.7% and 53.6% patients in the ceftazidime-avibactam and cefepime groups, respectively. Serious AEs occurred in 11.9% (ceftazidime-avibactam) and 7.1% (cefepime) patients. One serious AE (ceftazidime-avibactam group) was considered drug related. In the microbiologic intent-to-treat analysis set, favorable clinical response rates >95% were observed for both groups at end-of-IV and remained 88.9% (ceftazidime-avibactam) and 82.6% (cefepime) at test-of-cure. Favorable per-patient microbiologic response at test-of-cure was 79.6% (ceftazidime-avibactam) and 60.9% (cefepime). CONCLUSIONS: Ceftazidime-avibactam was well tolerated in children with cUTI, with a safety profile consistent with that of adults with cUTI and of ceftazidime alone, and appeared effective in children with cUTI due to Gram-negative pathogens.
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