Mario Rizzetto, born 4 june 1945, is Honorary Professor of Gastroenterology at the University of Torino, Italy. From 1995 to 2015 he has been head of the Chair of Hepatogastroenterology of the University of Torino.
He had a research stage at the Middlesex Hospital in London in 1972-1973 where he described the Liver-Kidney microsomal autoantibody diagnostic of autoimmune type 2 hepatitis.His scientific carrier has been mainly devoted to the pathobiology, natural history and therapy of chronic viral hepatitides; his specific reseach field has been the epidemiological and clinical evaluation of the Hepatitis D Virus and related hepatitis D, which he discovered in the mid 1970s and characterized in subsequent years .
are the King Faisal Prize for Medicine 1985 in Saudi Arabia, the Robert Koch Prize for Medicine, 1987 in Germany, the William Beaumont Prize for Gastroenterology, 1988 in US.