aDepartment of Molecular Biology and Microbiology, School of Medicine, Case Western Reserve University

bCase Western Reserve University-Cleveland VA Medical Center for Antimicrobial Resistance and Epidemiology, Cleveland, Ohio, USA

cGrupo de Resistencia Antimicrobiana y Epidemiología Hospitalaria, Universidad El Bosque, Bogotá, Colombia

dMedical Service and Geriatric Research, Education, and Clinical Center, Veterans Affairs Northeast Ohio Healthcare System

eDepartments of Medicine, Biochemistry, Pharmacology, and Molecular Biology and Microbiology, School of Medicine, Case Western Reserve University, Cleveland, Ohio

fDepartment of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA

Correspondence to David van Duin, 130 Mason Farm Road, 2nd Floor CB# 7030, Chapel Hill, NC 27599, USA. Tel: +1 919 843 2200; e-mail: [email protected]