Marion Dorset graduated from UT in 1893. He discovered the cause of hog cholera and developed a serum for it. The eradication of hog cholera is his best known accomplishment, but he also developed a rapid diagnostic test for pullorum, a disease of chickens, that has saved poultry farmers millions of dollars. The purple ink used by government graders on meat to indicate that the meat is healthy and wholesome is a Dorset invention. He is a member of the Tennessee Agricultural Hall of Fame.