Meropenem-Vaborbactam as Salvage Therapy for Ceftazidime-Avibactam-Resistant <i>Klebsiella pneumoniae</i> Bacteremia and Abscess in a Liver Transplant Recipient

Abstract

We report a case of a 24-year-old liver transplant recipient who developed hepatic artery thrombosis and graft failure, which was complicated by subphrenic abscess and persistent <i>Klebsiella pneumoniae</i> carbapenemase (KPC)-producing <i>K. pneumoniae</i> bacteremia. Ceftazidime-avibactam treatment led to emergence of resistance, and alternative combination therapy failed due to persistent infection and toxicity. The infection resolved after initiation of meropenem-vaborbactam, which created a bridge to retransplantation. Treatment-emergent ceftazidime-avibactam resistance is increasingly recognized, suggesting a role for meropenem-vaborbactam.