born Oct. 30, 1895, Lagow, Brandenburg, Ger.
died April 24, 1964, Burgberg, near Königsfeld, W.Ger.
German bacteriologist and pathologist.
While director of the Bayer Laboratory for Experimental Pathology and Bacteriology, Domagk noticed the antibacterial action of a dye, Prontosil red, against streptococcal infection in mice. Found to be an effective treatment in humans, Prontosil became the first sulfonamide drug. Awarded a Nobel Prize in 1939, Domagk was unable to accept it at the time because of Nazi policy. He also was active in research on tuberculosis and cancer.