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Faculty and Staff
Co-Director of the JHHS HEIC Clinical Community
Senior Director of Healthcare Epidemiology and Infection Control
Associate professor in infectious diseases and epidemiology at The Johns Hopkins University, is the Hospital Epidemiologist and Director of the Department of Hospital Epidemiology and Infection Control (HEIC) at the Johns Hopkins Hospital. In this role, she is responsible for the conceptualization, planning, implementation, and development of the hospital’s infection control and prevention program. Her research interests are the epidemiology, prevention and control of healthcare-acquired infections and antimicrobial-resistant gram negative bacilli. Dr. Maragakis serves as a Councilor on the Board of Directors of the Society for Healthcare Epidemiology of America (SHEA).
Polly Trexler, M.S., C.I.C.
Infection control practitioner and epidemiologist, is the Director of Operations for Department of Hospital Epidemiology and Infection Control (HEIC) at the Johns Hopkins Hospital. In this role, she is responsible for the oversight of HEIC operations, coordination and supervision of the Infection Control Epidemiologists, and management of the daily operations of the HEIC department.
Clare Rock MD, MS
Assistant Professor of Medicine, Division of Infectious Diseases at the Johns Hopkins University School of Medicine and Associate hospital Epidemiologist at the Johns Hopkins Hospital. Her research interest focuses the role of the hospital environment in pathogen transmission. Her work includes epidemiological studies looking at infection prevention and improved clinical outcomes related to novel methods of environmental cleaning.
Valeria Fabre, MD
Professor of medicine and epidemiology at Johns Hopkins University, is an infectious diseases physician, Director of the Antimicrobial Stewardship Program and Associate Hospital Epidemiologist at The Johns Hopkins Hospital. She is responsible for oversight of antibiotic use at hospital and assists the hospital epidemiologist with the functions of the HEIC department. Dr. Cosgrove’s research interests include epidemiology and outcomes of antimicrobial resistance, development of tools and programs to promote rational use of antimicrobials, prevention of hospital-acquired infections and epidemiology and management of S. aureus bacteremia. She currently serves as Secretary on the SHEA Board of Directors and is the Chair of SHEA’s Antimicrobial Stewardship Taskforce.department.
Aaron Milstone, M.D., M.H.S.,FSHEA
Associate professor of pediatrics and epidemiology at The Johns Hopkins University, is an infectious disease consultant and Associate Hospital Epidemiologist at The Johns Hopkins Hospital. His research interests focus on prevention of hospital-acquired infections (HAIs) and emergence of antibiotic resistance in children. His studies are helping to define prevalence and transmission of multidrug-resistant bacteria in hospitalized children and identify interventions to reduce their spread and prevent HAIs, and to understand the epidemiology and prevention of bloodstream infections in children.
Valeria Fabre, M.D.
Assistant Professor of Medicine, Division of Infectious Diseases at the Johns Hopkins University School of Medicine and Associate hospital Epidemiologist at the Johns Hopkins Hospital.
Mary Elizabeth Griffith, RN
Assistant Director of HEIC
Senior Infection Control Practitioners/Epidemiologists
The Senior Infection Control Practitioners collaborate with the director and associate director of HEIC to oversee departmental operations; mentor and support departmental staff; plan, lead and implement the infection control program for their areas of responsibility; evaluate policies, procedures and practices relating to infection control; develop web-based educational materials; investigate clusters and outbreaks; monitor healthcare-associated infection rates and produce summary reports; and lead collaborative interventions to prevent healthcare-associated infections.
Donna Fellerman, RN, CIC
Melanie Curless, RN, MPH, CIC
Carrie Billman, RN,CIC,BSN
Infection Control Practitioners/Epidemiologists
The Infection Control Practitioners plan, lead and implement the infection control program for their areas of responsibility; evaluate policies, procedures and practices relating to infection control; develop web-based educational materials; investigate clusters and outbreaks; monitor healthcare-associated infection rates and produce summary reports; and lead collaborative interventions to prevent healthcare-associated infections.
Amy Winkler, RN, MPH, CIC
Anya Abashian MPH,CIC
Emily Singeltary, MPH
Heather Saunders, RN
Jennifer Andonian,CIC, MPH
Jennifer Berry, MPH
Maggie Schiffhauer, MHS, CIC
Sabrina Gaiazov, MPH
Tamasin Yarina, MPH
Infection Control Associates
Avinash Gadala, M.S., B.Pharma
Clinical Analytics Systems Architect for the Johns Hopkins Health system and department. In this role, he participates in making strategic data-related decisions by sourcing, analyzing, validating, internally managing and reporting high quality and often complex data to detect, quantify and prevent healthcare-acquired infections and track antimicrobial use and antimicrobial resistance in The Johns Hopkins Hospital. He defines and directs the data management workflow for assigned projects, ensuring all necessary data quality control measures are in place and serves as the data management expert. He assists research efforts by providing statistical support, directs the creation and management of new database systems and implements reporting and quality assurance activities.
Tim Williams, B.S., BI Developer & Data Analyst
Financial Analyst and Project Manager for the department. In this role, she works with faculty and administrative staff in the compilation and management of financial information, budgets, grants, and contracts. She also manages diverse departmental projects and supports the JHH Department of Hospital Epidemiology and Infection Control and the Antimicrobial Stewardship Program in data collection, analysis, and data management.
Project Coordinator for the department. In this role, she assists the faculty and staff and coordinates a variety of departmental projects, activities and schedules for the infection control professionals and other staff in the department.
Hand Hygiene Compliance Coordinator for the department. In this role, she monitors compliance with hand hygiene policies in the hospital, provides direct feedback and education to hospital personnel regarding hand hygiene processes, and supports departmental projects and activities.
Tracy Ross, MT
Molecular Microbiology and Epidemiology Laboratory Specialist. In this role, she conducts and supports laboratory functions related to infection control, performs molecular typing of pathogens, and supports the investigative and research activities of the Department of Hospital Epidemiology and Infection Control and the Antimicrobial Stewardship Program at the Johns Hopkins Hospital.
Verna Scheeler, Research Manager
Mike Anderson, Research Assistant
James Lillie, Research Assistant
Stephanie Cummings, Research Assistant