Elizabeth S. Williams, DVM, PhD, is a professor of veterinary sciences at the University of Wyoming. She has been specializing in the research of infectious diseases of wild animals since 1977. She also serves as a diagnostic pathologist.

Ian K. Barker, DVM, PhD, is professor of veterinary pathology in the Department of Pathobiology in the Ontario Veterinary College at the University of Guelph. His research focuses on infectious diseases of wild animals, and he is an expert in alimentary tract diseases.