Theodor Escherich (German pronunciation: [ˈteːodoːɐ̯ ˈʔɛʃəʁɪç]; 29 November 1857 – 15 February 1911) was a German-Austrian pediatrician and a professor at universities in Graz and Vienna. He discovered and described the bacterium Escherichia coli.
Alois Alzheimer ( ALTS-hy-mər, US also AHLTS-, AWLTS-, German: [ˈaːlɔɪs ˈʔaltshaɪmɐ]; 14 June 1864 – 19 December 1915) was a German psychiatrist and neuropathologist and a colleague of Emil Kraepelin. Alzheimer is credited with identifying the first published case of "presenile dementia", which Kraepelin would later identify as Alzheimer's disease.