John is currently professor emeritus at the Swedish University of Agricultural Sciences, Uppsala Sweden, having served as professor of equine internal medicine there since the year 2000. Prior to relocating to Sweden he had taught in the veterinary faculties at the University of Prince Edward Island, Canada, and at the University of Tennessee, USA.  He obtained his veterinary degree from the Ontario Veterinary College, Guelph Canada in 1981, and defended his PhD from the University of Liège, Belgium, in 1998. He attained board certification by the American College of Veterinary Internal Medicine in 1988 and was one of the founding diplomates of the European College of Equine Internal Medicine. His research interests are infectious diseases of the horse, with current focus on the host pathogen relationship in carrier states of strangles.