Shwartzman, Gregory (1896–1965),
American bacteriologist. Born in Odessa, Russia, Shwartzman received his medical degree in Brussels and later worked as a researcher at London's Lister Institute before coming to the United States in 1923. In 1926 he became head of the department of bacteriology at New York's Mount Sinai Hospital, where he spent the bulk of his career. Concurrently he held a professorship at Columbia University. His areas of research included immunological reactions in tissue cultures and the effects of vitamins on bacterial growth. In 1928 he published an article on the phenomenon of local skin reactivity to bacterial filtrates in which he described what is now known as the Shwartzman reaction or Shwartzman phenomenon.