He studied medicine at the universities of
Prague and
Strasbourg, earning his doctorate at Prague in 1878. Following graduation he remained in Prague as an assistant to
pathologist Edwin Klebs. From 1879 to 1881 he worked with his father, and in 1881–1882 was an assistant to
Alfred Pribram. In 1882 he moved to
Vienna, where he was assistant to
Hermann Nothnagel. The following year he received his
habilitation in internal medicine. In 1887 he was appointed professor of
pediatrics at the
University of Graz, later becoming a professor of
internal medicine and director of the second internal clinic at
Karl-Ferdinands-Universität (German University) in Prague. Here, he was instrumental in the construction of a modern clinic that first opened in 1899. He worked in Prague until his retirement in 1925. He was a prolific author, one of his better efforts being
Klinische Diagnostik innerer Krankheiten (1882), a work that was published over several editions and later translated into English as
Clinical diagnosis : the bacteriological, chemical, and microscopical evidence of disease. On his initiative he started with the construction of a new, much more modern and hygienic designed clinic that was opened in 1899. Jaksch was awarded in 1899 for this construction of his permanent bathrooms at the nursing exhibition in Berlin. He was widely honored and awarded, and was included as a member of the Leopoldin-Karolin, the
German Academy of Natural Scientists in Halle and the medical surgical academy in Perugia. In 1882 von Jaksch married Adele von Haerdtl (1867−1944) in Vienna. They had one son and three daughters. He had one brother named August Jaksch von Wartenhorst (1859–1939). == Discoveries==