Karl Joseph Eberth (21 September 1835 – 2 December 1926) was a German pathologist and bacteriologist who was a native of Würzburg.

In 1859 he earned his doctorate at the University of Würzburg, and became an assistant to anatomist Albert von Kölliker (1817–1905). In 1869 he became a full professor of pathological anatomy at the University of Zurich, and from 1881 until his retirement in 1911, he was a professor at the University of Halle.^{[citation needed]}

In 1880 Eberth described a bacillus that he suspected was the cause of typhoid.^[1] In 1884 pathologist Georg Theodor August Gaffky (1850–1918) confirmed Eberth's findings,^[2] and the organism was given names such as "Eberthella typhi", "Eberth's bacillus" and "Gaffky-Eberth bacillus". Today the bacillus that causes typhoid fever goes by the scientific name of Salmonella enterica subspecies enterica serovar Typhi.^[3][4]

• "Eberth's lines": Microscopic lines that appear between the cells of the myocardium when stained with silver nitrate.^[5]
• "Eberth's perithelium": an incomplete layer of connective tissue cells encasing the blood capillaries.^[6]

• Untersuchungen über nematoden, (Leipzig : W. Engelmann, 1863).
• Zur Kenntnis der Bacteritischen Mykosen, (Leipzig : Engelmann, 1872).^[7]
• Zur kenntniss der blutplättchen bei den niederen wirbelthieren, (Leipzig, Engelmann, 1887).
• Die Thrombose nach Versuchen und Leichenbefunden, with Curt Schimmelbusch, (Stuttgart, 1888).
• Die männlichen Geschlechtsorgane, (Jena, Fischer, 1904).^[8]

• Pathology
• List of pathologists