Dr. Thayer has been in the practice of gastroenterology for the past 35 years. He has been the Section Chief of Gastroenterology at Brown University and its affiliated hospital from 1965 to 1995. At that time Dr. Thayer reached his retirement age of 65 and settled down into the private practice of gastroenterology. During his days of active research he was very interested in the mycobacterial etiology of Crohn's disease. At the 1970 World Congress held in Copenhagen, Denmark, he was privileged to give the Quadrennial lecture on Crohn's disease and strongly suggested that a mycobacteria was the etiological agent in Crohn's disease.
Dr. Thayer has spent most of his life doing research on Crohn's disease and was instrumental in getting Dr. Rodrick Chiodini to culture the intestinal tissue from his patients. This was the first isolation of paratuberculosis that was made. Dr. Thayer has been interested in immunology of the disease and has also conducted a controlled trial of Rifabutin/streptomycin in the treatment of Crohn's disease. At this time he is not performing active research in the area, but is very interested and still uses antimycobacterial treatment in some of his more difficult patients.
Dr. Thayer received Clinician of the Year Award from the American Gastroenterological Association in 1999. Dr. Thayer has over 100 publications in all aspects of gastroenterology, especially in the area of Inflammatory Bowel Disease.