Dorset, Marion (dôr`sət), 1872–1935, American biochemist, b. Columbia, Tenn.; grad. Univ. of Tenn. (B.S., 1893) and Columbian (now George Washington) Univ. (M.D. 1896). He began working as a researcher for the U.S. Dept. of Agriculture in 1894 and became chief of the biochemical division in 1904. He made important discoveries in bacterial toxins, diseases of animals, and disinfectants, and pioneered work in the inspection of meat food products. He was codiscoverer of the virus that causes classical swine fever and later developed a serum to prevent it.