Ismar Isidor Boas

He described Lactobacillus acidophilus, a bacillus found in the gastric juice of individuals with stomach carcinoma.

In 1895 he founded the Archiv für Verdauungs-Krankheiten, the first medical journal dedicated to gastroenterological topics, and in 1913 established the German gastroenterological society (Deutsche Gesellschaft für Verdauungs- und Stoffwechselkrankheiten).

[1] He also has a handful of eponyms named in his honor, including: Being a Jew, Boas lost his teaching position in the University of Berlin and left for Vienna in 1936.

When the Nazis entered Austria, he killed himself with an overdose of the sedative Veronal.

His wife Sophie and son Kurt, a dermatologist, were killed by the Nazis.