Zeissl received his medical doctorate from the
University of Vienna, and from 1846 worked as a medical assistant in the surgical and dermatological hospitals at the university. In 1861 he became an associate professor in
Vienna, and in 1869 was appointed professor and chief physician of the second department for
syphilis at
General Hospital Vienna. During his career, he was an authority on
skin diseases and syphilis.
Written works
Compendium der Pathologie und Therapie der primär-syphilitischen und einfach venerischen Krankheiten (Wien, 1850).
Lehrbuch der constitutionellen Syphilis für Aerzte und Hörer der Medicin (Erlangen, 1864).
2nd edition, revised and enlarged: Lehrbuch der Syphilis und der mit dieser verwandten örtlichen venerischen Krankheiten (2 volumes, Erlangen 1871/72).