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New Fellow Spotlight: Krystle Reagan, DVM, PhD, DACVIM (SAIM), FACVIM (Infectious Disease)

Mar 17, 2025, 00:00 AM by The ACVIM

Krystle Reagan, DVM, PhD, DACVIM (SAIM), FACVIM (Infectious Disease) is an associate professor of small animal internal medicine and Co-Director of the Veterinary Center for Clinical Trials at the University of California, Davis. She obtained her veterinary degree and PhD in microbiology at Colorado State University.  Upon graduating, she completed a one year small animal rotating internship at VCA West Los Angeles Animal Hospital followed by a small animal internal medicine residency at UC Davis and became Board-certified in the American College of Veterinary Internal Medicine. She then completed a fellowship in companion animal infectious diseases also at UC Davis. Her areas of research include the development of novel infectious disease diagnostics and therapeutics and the use of artificial intelligence/machine learning in clinical decision making, and she is a founding member of the Artificial Intelligence in Veterinary Medicine Interest Group.  


What drove you to want to become a Fellow of the ACVIM? Is there a story or experience that stands out in your mind that reaffirmed your decision to follow this path?
I have always been drawn to infectious diseases. I remember reading “The Hot Zone” when I was in high school, and I was hooked! After my internal medicine residency, I wanted to have more dedicated time to focus on these complex cases and learn from the leaders in the field. Doing a fellowship in infectious disease allowed me to accomplish those goals.

What do you see as the advantage(s) of ACVIM-approved Fellowship Programs/fellowship-level training as a whole?
ACVIM-approved fellowship programs provide an invaluable opportunity for highly specialized training in internal medicine. As clinicians, we all have encountered cases that challenge our knowledge and expertise, and in these moments, having access to someone with years of dedicated training may make all the difference.  A fellowship program allows one to master a niche corner of medicine, and therefore, they can offer unique insights. Further, ACVIM-approved fellowship programs may help make that level of training more accessible for diplomats by making them aware this type of training is available, thus enhancing the overall knowledge base and resource pool for the veterinary community.

Were there any specific challenges you faced along the way? How did you overcome them?
One of the most challenging aspects of veterinary medicine is recognizing and communicating to clients when no good treatment options are available to help their pet. As an infectious disease fellow, I developed strong relationships with dedicated pet owners who would sometimes bring their animals in every day for weeks to receive antifungal treatments or undergo multiple in-depth diagnostics. It’s difficult to walk alongside these clients, sharing their hope and commitment, only to reach a point where no good treatment options exist. Guiding clients through these moments and helping them navigate the tough decision to stop can be emotionally taxing. However, I have found that one silver lining amidst these tough cases is the opportunity to learn from every patient. I always take time to reflect on what worked and what didn’t, and I use these experiences to improve my approach for future cases or build future research questions. 

What advice do you have for those aspiring to become ACVIM Fellows? 

If you are passionate about an area of medicine and want to have protected time to grow your skill set, network with leaders in the field, and set yourself up for future success, don’t hesitate! 

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