Faculty / Staff
Meera Heller, DVM, PhD, DACVIM - Section Head
Dr. Meera Heller earned her veterinary degree and a PhD in Comparative Pathology from UC Davis. Following veterinary school, she completed an internship in Large Animal Medicine and Surgery at the University of Prince Edward Island’s Atlantic Veterinary College and a residency in Large Animal Internal Medicine at UC Davis. Previously, Dr. Heller was an Assistant Professor of Food Animal Medicine and Surgery at the University of Missouri. Her research interests are in the areas of innate immunity and juvenile immunity, especially as they pertain to prevention and treatment of calfhood disease. Dr. Heller’s clinical expertise is in internal medicine and surgery of ruminants and swine, with a special interest in goats.
John A Angelos, DVM, MS, PhD, DACVIM
Dr. John Angelos earned his veterinary degree from Cornell University in 1992. He also holds a Masters in Virology from Cornell and a PhD in Comparative Pathology from UC Davis. Dr. Angelos is board certified in large animal medicine by the American College of Veterinary Internal Medicine. His areas of veterinary focus include: livestock internal medicine; infectious diseases of livestock; pathogenesis and prevention of infectious bovine keratoconjunctivitis (pinkeye); vaccine development; and recombinant protein expression/purification for use in novel vaccine formulations.
Munashe Chigerwe, BVSc, MPH, PhD, DACVIM
Dr. Munashe Chigerwe earned his veterinary degree from the University of Zimbabwe in 2001. He went on to complete a Masters of Veterinary Public Health and a PhD in Pathobiology from the University of Missouri-Columbia in 2008. He completed a one-year internship and a three-year residency in livestock medicine and surgery at the University of Missouri-Columbia. Dr. Chigerwe is board certified in large animal medicine by the American College of Veterinary Internal Medicine. His area of research interest in livestock health includes passive transfer of colostral immunoglobulins in dairy calves.
Rosie Busch, DVM - Staff VeterinarianDr. Rosie Busch earned her veterinary degree from UC Davis in 2009. Following graduation, she worked at a mixed animal practice for one year in Hollister, California. Dr. Busch returned to UC Davis and completed a three-year residency in Large Animal Internal Medicine in 2013. Her research interests are innate immunity, acid-base disorders in calves, and musculoskeletal injuries in bucking bulls. Dr. Busch’s clinical interests are internal medicine and surgery in ruminants and pigs and lameness in bucking bulls.
Lisa Gamsjaeger, DVM - Resident II
Dr. Lisa Gamsjaeger earned her veterinary degree from the University of Veterinary Medicine in Vienna, Austria. She spent one semester abroad in Pretoria, South Africa, where she completed her general clinical rotations and discovered her love for livestock species specifically. She then specialized in ruminant medicine and veterinary public health and finished her studies in Austria with a master thesis evaluating fatty acid composition in game and the influence of rearing on meat quality. Dr. Gamsjaeger completed a one-year internship in farm animal medicine and surgery at the University College Dublin, Ireland, prior to beginning her large animal medicine residency with livestock emphasis at UC Davis.
Hayam Hussein, DVM, MVSc, PhD - Resident I
Dr. Hayam Hussein obtained her veterinary degree from South Valley University in Qena, Egypt. She then completed a clinical training at the large animal clinic of the veterinary teaching hospital at Zagazig University, Egypt, followed by an MVSc in veterinary internal medicine. Dr. Hussein worked as a research veterinarian at the National Research Centre in Giza, Egypt, focusing on livestock clinical research. Dr. Hussein then completed a PhD and a postdoctoral training in comparative and veterinary medicine at The Ohio State University before beginning her livestock medicine and surgery residency at UC Davis in 2016.