The purpose of this study is to characterize the intrapulmonary penetration of nacubactam in healthy volunteers. Nacubactam is a novel non-beta-lactam beta-lactamase inhibitor being developed as a combination therapy with the beta-lactam meropenem for the treatment of serious gram-negative bacterial infections. Adult male and female healthy participants will receive a single intravenous infusion of nacubactam co-administered with meropenem and then undergo a bronchoalveolar lavage (BAL) procedure to collect lung epithelial lining fluid (ELF) for measurement of intrapulmonary concentrations of nacubactam and meropenem.