Our Fellows

Dr. Josh Klinnert hails from Amarillo, TX. He earned his Doctorate of Osteopathic Medicine at Kansas City University and before going on to complete residency at the University of Texas Medical Branch in 2026. Dr. Klinnert’s clinical interests include tropical medicine, HIV, and phage therapy.

Due to prior experience working in a greenhouse, Dr. Klinnert really enjoys visiting the Missouri Botanical Garden. He also thrives on French bakeries, so you may find him drinking coffee at La Belle Vie.

Why did you choose WashU Medicine for your ID fellowship?
“I chose WashU for fellowship because of the diverse array of clinical infectious disease. As a major referral center for the Midwest, there’s a unique opportunity to see the intersection of urban and rural pathology which provides a truly comprehensive training experience. Additionally, the support offered by the program and the regard for fellow wellness is unparalleled.”

Dr. Justin Klucher grew up in North Little Rock, AR. He holds a Bachelor’s of Science in Biology and Biochemistry from University of Arkansas Fayetteville. Dr. Klucher then went on to earn his medical degree from University of Arkansas for Medical Sciences before completing his residency at the University of Maryland Medical Center in Baltimore in 2025.

Dr. Klucher joined WashU Medicine in 2025 for a combined Adult/Pediatric Infectious Diseases Fellowship, and after his first year with Pediatrics, he started with Adult ID in 2026. His clinical interests include antimicrobial stewardship; longitudinal pediatric into adulthood HIV, and sexual healthcare.

Why did you choose WashU Medicine for your ID fellowship?
“I appreciated the large volume of providers between adult and pediatric infectious diseases. The Program Director, Dr. Wooten, also referred me to the Program Director for Pediatric Infectious Diseases, Dr. Rosen, after reading my personal statement. She encouraged me to consider a dual fellowship, something I had previously given up on due to concerns for it being logistically too complicated. They were welcoming and encouraging which promoted my desire to come here. Ultimately, I had a gut feeling that this was the right place for me, and I’m super happy to be here now having completed my first year of Pediatric Infectious Disease fellowship.”

Dr. Meyer is from St. Louis and grew up in Oakville, MO. She earned an B.S. in Biology with a minor in Music from Truman State University in 2014 and a M.S. in Microbiology and Immunology in 2016 from Tulane University in New Orleans. She completed medical school at the University of Missouri in 2020, followed by a four-year Internal Medicine/Research-Track residency at Tulane University in 2024. She loves to explore new restaurants and coffeeshops, especially if she can bring her dog Bennie.

Why did you choose WashU for your ID fellowship?
“I first worked in an infectious diseases lab at WashU in high school. It was a formative experience with a wonderful mentor. When choosing a fellowship, I was looking for strong research opportunities, diverse clinical training, and genuinely kind people. From my prior experience and interview day, it was clear WashU offered all of that — plus the chance to return to my hometown.”

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. 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.”