US pathologist Simon Flexner (1863-1946) as a child. Flexner, the elder brother of Abraham Flexner, taught at Johns Hopkins University and the Univers
US pathologist Simon Flexner (1863-1946) as a child. Flexner, the elder brother of Abraham Flexner, taught at Johns Hopkins University and the University of Pennsylvania before becoming the first director (1901 to 1935) of the Rockefeller Institute for Medical Research and a trustee of the Rockefeller Foundation. Flexner worked on experimental epidemiology and venoms, poliomyelitis, serum treatment of cerebrospinal meningitis, and for isolating a bacillus of dysentery (Shigella dysenteriae). The bacterium Shigella flexneri was named in his honour. A collection of his papers and photographs is held at the American Philosophical Society.
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