Internal Medicine

Faculty/Staff

Photo: Lynelle Johnson, DVM, MS, PhD, DACVIM - Chief of Service

Lynelle Johnson, DVM, MS, PhD, DACVIM - Chief of Service

Dr. Johnson received her DVM from The Ohio State University, was in private practice on Long Island for 3 years and completed a master's degree and residency program at the University of Illinois. She is Board Certified in Small Animal Internal Medicine. Dr. Johnson's master's research investigated an experimental model of feline asthma, and she completed a post-doctoral fellowship in radiation oncology at Colorado State University. She received a grant from the National Institute of Health's Heart, Lung and Blood Institute to study the effects of exercise on pulmonary vascular function and received her PhD in Physiology from the University of Missouri. Dr. Johnson is the respiratory section editor for the 5 Minute Veterinary Consult and has written a textbook entitled Clinical Canine and Feline Respiratory Medicine. Dr. Johnson is a member of Veterinary and Comparative Respiratory Society, and her research interests include pulmonary vascular biology, cardiopulmonary interactions and clinical respiratory disease of dogs and cats. 

Photo: Larry Cowgill, DVM, PhD, DACVIM

Larry Cowgill, DVM, PhD, DACVIM

Dr. Cowgill received his DVM degree from the University of California at Davis and completed his internship and residency training at the University of Pennsylvania. He was a National Institutes of Health Special Research Fellow at the Renal and Electrolyte Section of the University of Pennsylvania School of Medicine and earned a PhD in Comparative Medical Sciences. He is Board Certified in Small Animal Internal Medicine and is Associate Dean for Southern California Clinical Programs, Co-Director of the UC Veterinary Medical Center-San Diego (UCVMC-SD), and Professor in the Department of Medicine and Epidemiology. He oversees the Clinical Nephrology programs and the Companion Animal Hemodialysis Units at the Veterinary Medical Teaching Hospital at Davis and the UCVMC-SD. Dr. Cowgill has more than 35 years of experience in veterinary internal medicine, nephrology, and teaching and has trained many of the leading veterinary nephrologists throughout the world. He is a pioneer in the application of hemodialysis in companion and remains a leading authority in the development of blood purification therapies for renal diseases in animals and people. 

Photo: Autumn Davidson, DVM, DACVIM

Autumn Davidson, DVM, DACVIM

Dr. Davidson is a graduate of the University of California, Davis School of Veterinary Medicine. She completed an internship in Small Animal Medicine and Surgery at Texas A&M University, and a residency at the University of California, Davis. She is Board Certified in Small Animal Internal Medicine and is a clinical professor at UC Davis specializing in small animal theriogenology (reproduction). In addition, Dr. Davidson practices at the PetCare Veterinary Hospital in Santa Rosa, a private referral practice, where she receives both internal medicine and reproduction cases. 

Photo: Jonathan Dear DVM, DACVIM

Jonathan Dear DVM, DACVIM

Dr. Dear is graduate of the University of Georgia College of Veterinary Medicine. He completed an internship in small animal medicine and surgery at the VCA Emergency Animal Hospital and Referral Center in San Diego. He recently completed his residency in small animal medicine at UC Davis and is board certified in Small Animal Internal Medicine. His interests include minimally invasive diagnostic and therapeutic procedures as well as lower urinary disease and endocrinology. 

Photo: Ann Della-Maggiore, DVM, DACVIM

Ann Della-Maggiore, DVM, DACVIM

Dr. Della Maggiore is a graduate of the University of California, Davis School of Veterinary Medicine. She completed an internship in small animal medicine and surgery at the Veterinary Medical and Surgical Group in Ventura, CA. She recently completed her residency in small animal internal medicine at UC Davis. Her interests include endocrinology, infectious and immune mediated disease, as well as minimally invasive diagnostic and therapeutic procedures

Photo: Edward Feldman, DVM, DACVIM

Edward Feldman, DVM, DACVIM

Dr. Feldman received his DVM degree from the University of California, Davis. He is a Board Certified in Small Animal Internal Medicine and is currently Professor in Medicine & Epidemiology. He has taught small animal internal medicine for more than 25 years and authored more than 50 book chapters, authored or co-authored more than 140 peer-reviewed scientific publications and more than 100 scientific abstracts. Dr. Feldman is a cofounder and former president of the Society of Comparative Endocrinology, a special interest group open to all veterinarians. He is the recipient of numerous awards, including the Norden Distinguished Teaching Award, the California Academy of Veterinary Medicine's Award for Teaching Excellence, and SmithKline Beecham Award for Research Excellence. He has co-authored two textbooks, the Textbook of Veterinary Internal Medicine with Dr. Stephen Ettinger, and Canine and Feline Endocrinology and Reproduction with Dr. Richard Nelson. 

Photo: Stan Marks, BVSc, PhD, DACVIM (Internal Medicine, Oncology), DACVN

Stan Marks, BVSc, PhD, DACVIM (Internal Medicine, Oncology), DACVN

Dr. Marks graduated from the University of Pretoria, South Africa and completed an internship in small animal medicine and surgery at the University of Missouri - Columbia. He completed a small animal internal medicine residency program at the University of Florida and an oncology residency program at the University of California, Davis. Dr. Marks received his PhD in nutrition from UC Davis and is currently a professor in the Department of Medicine and Epidemiology. Dr. Marks is Board Certified in the American College of Veterinary Internal Medicine in the specialties of internal medicine and oncology, and is a Diplomate of the American College of Veterinary Nutrition. He is the Director of the Companion Animal Gastrointestinal Laboratory that focuses on furthering our understanding and knowledge of bacterial-associated diarrhea, with an emphasis on clostridial diseases. In addition, Dr. Marks has research interests in the diagnosis and management of dysphagia (disorders of swallowing) in dogs. Dr. Marks has received numerous teaching awards over the years, has published extensively in the areas of canine and feline gastroenterology, and has contributed chapters to a number of textbooks.

Photo: Richard Nelson, DVM, DACVIM

Richard Nelson, DVM, DACVIM

Dr. Nelson received his DVM degree from the University of Minnesota, completed a small animal internship at Washington State University, and a small animal medicine residency at the University of California, Davis. He is Board Certified in Small Animal Internal Medicine and is a professor in the Department of Medicine and Epidemiology. Dr. Nelson's research and clinical interests lie in the arena of small animal clinical endocrinology with a focus on diabetes mellitus, hypothyroidism, and diseases of the adrenal gland in dogs and cats. Dr. Nelson is a cofounder of the Society of Comparative Endocrinology, has authored numerous research manuscripts and book chapters and has co-authored two textbooks, Canine and Feline Endocrinology and Reproduction with Dr. Edward Feldman and Small Animal Internal Medicine with Dr. Guillermo Couto. He has lectured extensively nationally and internationally. 

Photo: Carrie Palm DVM, DACVIM

Carrie Palm DVM, DACVIM

Dr. Palm graduated from the University of California, Davis and completed an internship and residency at the University of Pennsylvania. She is Board Certified in Small Animal Internal Medicine. Following a year in a specialty practice at Veterinary Medical and Surgical Group in Ventura, CA, completed a fellowship in hemodialysis and joined the faculty in Clinical Small Animal Internal Medicine.

Photo: Jane Sykes, BVSc, PhD, DACVIM, Director of Small Animal Clinical Services

Jane Sykes, BVSc, PhD, DACVIM, Director of Small Animal Clinical Services

Dr. Sykes obtained her veterinary degree at the University of Melbourne in Australia and a PhD in veterinary microbiology, which focused on upper respiratory tract infections of cats. She completed a residency at the University of Minnesota and is board certified in Small Animal Internal Medicine, with a special interest in infectious disease, immune-mediated disease and hematologic disease. She is a co-founder and past President of the International Society for Companion Animal Infectious Diseases and President of the ACVIM Specialty of Small Animal Internal Medicine. Her research interests are primarily in the field of canine and feline infectious diseases, including canine and feline hemoplasmosis, leptospirosis, cryptococcosis, infections of immunosuppressed dogs and cats, antimicrobial resistance and tick-borne diseases. She has authored numerous papers and textbook chapters, is the author of the textbook Canine and Feline Infectious Diseases. She also has 3 children, a yellow Labrador and 2 cats.

Photo: Jodi Westropp, DVM, PhD, DACVIM

Jodi Westropp, DVM, PhD, DACVIM

Dr. Westropp received her veterinary degree from The Ohio State University, and completed an internship in small animal medicine and surgery at The Animal Medical Center in New York City. She returned to Ohio to complete a residency in small animal medicine and post-doctoral training evaluating neurologic and inflammatory influences on bladder function in cats. She is Board Certified in the Small Animal Internal Medicine and is the director of the G.V. Ling Urinary Stone Analysis Laboratory. Her research interests include disorders related to the lower urinary tract of cats and dogs, including urinary stone disease, urinary incontinence and feline idiopathic cystitis.