People

Dr. Joshua Nordman specializes in clinical infectious diseases, with a particular interest in the intersection of social vulnerability and infection. His research interests include antimicrobial research that leverages electronic health record (EHR) systems and large language models (LLMs) for improvement in patient care outcomes. 

Rachel is a nurse practitioner in the infectious diseases outpatient clinic.

Dr. Olsen’s primary research interests involve the epidemiology of hospital-acquired infections, particularly surgical site infection, and the use of administrative and claims data to study surgical complications.

Areas of Interest in ID:
Host pathogen interaction in bacterial pathogenesis

Hayley is a nurse practitioner in the infectious diseases division. She sees patients at Barnes-Jewish West County Hospital – Medical Office Building 2, 10 Barnes West Drive, Creve Coeur, MO 63141 Suite: 200
Fax: 855-202-2372

Dr. Priya Pal is a physician-scientist and infectious disease specialist whose research bridges fundamental immunology and translational HIV science. She additionally runs an HIV cure trial out of the Infectious Diseases Clinical Research Unit (ID-CRU) and serves on the inpatient infectious diseases consult service.

Dr. Pande specializes in the care of transplant recipients, with a special focus on opportunistic infections and antimicrobial prophylaxis in bone marrow transplant recipients.

Dr. Parra-Rodriguez specializes in the longitudinal clinical care of people with HIV, with a special clinical research focus on aging, age-related clinical conditions, and mental health in people with HIV. As a core faculty member of the ID Fellowship Program, he serves as Co-Director of the STI and HIV Track.

Dr. Philips is principal investigator of an NIH-funded lab that studies how Mycobacterium tuberculosis evades the host immune response.

Marilia Pinzone is an infectious diseases physician-scientist. As a scientist, she is currently investigating chronic inflammation during antiretroviral therapy (ART). As a physician, Dr. Pinzone's interests are outpatient care of people living with HIV, infectious diseases, and metabolic complications of HIV.

Dr. Powderly has been actively involved in HIV-related clinical research for over thirty years with specific interests in opportunistic infections, metabolic complications and long-term outcomes of antiretroviral therapy.

Dr. Presti specializes in clinical and translational research in infectious disease, with a special focus on HIV, SARS-CoV-2 and other viral infections.

Jeanette sees patients at the
Infectious Diseases Clinic
620 South Taylor Ave., Suite 100
St. Louis, MO 63110
Appointments: 314-362-9098
Fax: 314-362-9851

Dr. Ramakrishnan’s research focuses on applying implementation science strategies to improve domestic HIV prevention and care, particularly for cisgender women.

Dr. Ratzlaff grew up in Hillsboro, KS. He completed his BS in Medical Molecular Biology at Oral Roberts University and Doctor of Osteopathic Medicine at Arkansas College of Osteopathic Medicine. He then completed his Internal Medicine Residency at UAMS Northwest in 2025, where he was Chief Resident from 2024-2025. His areas of clinical interest include emerging pathogens, antimicrobial-resistant organisms, and infections in immunocompromised hosts, including invasive fungal infections. Outside of medicine, Dr. Ratzalff enjoys staying active, including long walks in Forest Park with his bernedoodle, Chip. He also likes trying new St. Louis restaurants with his wife.

Why did you choose WashU for your ID fellowship?
“I chose WashU for fellowship training because of its high clinical volume and complex patient population, which draws referrals from multiple surrounding states. I was also drawn to the strength of the program and department leadership, as well as the opportunity to learn from faculty who are leaders in their fields.”

Dr. Rauseo specializes in clinical infectious diseases, with a special focus on mycology and infectious that affect immunocompromised hosts. Since the outset of the COVID-19 pandemic she has served as an investigator in the Infectious Disease Clinical Research Unit (ID-CRU) in multiple clinical trials and translational research in the fight against COVID-19.

Dr. Reddy grew up across several states in south India and calls the entire region his home. He completed his medical education at the Kasturba Medical College Mangalore of Manipal University, earning an MBBS. He then earned his MPH at the University of Edinburgh before going on to complete his residency at Garden City Hospital through Michigan State University in 2025. His areas of interest include STIs, parasitology, HIV/AIDS and anti-microbial stewardship. On his day off, you can find him going for a run in Forest Park or hiking the Mural Mile.

Why did you choose WashU for your ID fellowship?
“WashU has one of the most robust Infectious Disease divisions in the country with global leaders across several domains of the specialty. The diversity and complexity of the patient profile encountered here, coupled with a rigorous and perfectly designed program, hones your skills and molds one to practice ID anywhere in the world.”