Austrian physician; born at Nikolsburg, Moravia, July 27, 1839; studied medicine at Vienna University, graduating and establishing himself as a physician in that city in 1862. In 1872 he became privat-docent at the university, department chief at the general dispensary, and physician at the Rothschild Hospital, Vienna; and in 1885 he was appointed assistant professor.
Oser is a collaborator on Eulenburg's "Encyclopädie der Gesammten Heilkunde" and on Nothnagel's"Handbuch der Speziellen Pathologie und Therapie." He has written essays for the medical journals, and is the author of: "Experimentelle Studien über Uterusbewegungen" (with Schlesinger), Vienna, 1873; "Ueber Darmsyphilis," ib. 1875; "Bericht über den Fleckentyphus," ib. 1876; "Ueber Darmsyphilis," ib. 1880; "Pathologie und Therapie der Cholera," ib. 1887; "Zur Pathologie der Darmstenosen," ib. 1890; etc.