Thomas Wittum is a professor of veterinary epidemiology in the Department of Veterinary Preventive Medicine at The Ohio State University College of Veterinary Medicine. He came to Ohio State in 1995 after completing a postdoctoral research position with the USDA's Agricultural Research Service. Dr. Wittum is an expert in animal-to-human disease transmission in a public health context. He serves as one of the directors of the Veterinary Public Health specialization within the College of Public Health’s MPH program. Dr. Wittum teaches a variety of topics related to veterinary epidemiology, veterinary public health, and zoonotic diseases in both the professional DVM and the graduate curricula. His research focus is on the epidemiology of infectious diseases in livestock populations, with emphasis on the modeling the relationships between health and production. His work in the area of zoonotic disease includes investigations of the ecology of antimicrobial resistance in intensively managed livestock operations, the public health risk of veterinary antimicrobial use, as well as the direct and food-borne zoonotic transmission of enteric pathogens. Dr. Wittum earned his B.S. degree at Kansas State University and his M.S. and Ph.D. degrees at Colorado State University.