Dr. Tamma is an Associate Professor of Pediatrics and the Director of the Pediatric Antimicrobial Stewardship Program at The Johns Hopkins University School of Medicine. She is also an Associate Professor in the Department of Epidemiology at The Johns Hopkins Bloomberg School of Public Health. Her research focuses on: (a) elucidating the mechanisms of resistance in gram-negative organisms, (b) developing and enhancing laboratory methods to identify gram-negative resistant organisms to enable critically-ill patients to be placed on appropriate antibiotic therapy as early as possible, and (c) identifying optimal treatment strategies for patients infected with multidrug-resistant gram-negative infections. She is an Editor at Antimicrobial Agents and Chemotherapy, a voting member of the Clinical Laboratory and Standards Institute Antibiotic Susceptibility Testing Subgroup that provides international guidance on establishing antibiotic breakpoints and phenotypic and genotypic methods for identifying antimicrobial resistance, a voting member of the NIH-funded Antibacterial Resistance Leadership Group Gram-Negative Resistance Committee, and the lead author of the Infectious Diseases Society of America Antimicrobial Resistance Treatment Guidance.