Antimicrobial Resistance and Infection Control (Dec 2018)
The addition of avibactam renders piperacillin an effective treatment for Mycobacterium abscessus infection in an in vivo model
Abstract
Abstract Treating M. abscessus infection is challenging due to the potent β-lactamase BlaMab (Beta-lactamase of M. abscessus ). Avibactam is a non-β-lactam, β-lactamase inhibitor shown to inhibit BlaMab. We tested whether avibactem can render piperacillin effective against M. Abscessus. In-vitro, avibactam enhanced the activity of piperacillin by 16–32 fold, with no significant effect on meropenem. In an in-vivo Galleria mellonella model, meropenem and piperacillin/avibactam significantly decreased infection burden compared to untreated controls. Neither piperacillin nor avibactam alone had a significant effect.
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