title: Robert Koch.
abstract: This article traces the origins of bacteriological research, with particular attention to the role of Robert Koch, and his postulates, on infectious agents. By chronologically following Koch's work on anthrax, germ photography and tuberculosis, it shows how the visual representation of germs transformed laboratory research in medical science.
authors.affiliation: Freie Universität Berlin, Institut für Geschichte der Medizin, Klingsorstr. 119, 12203, Berlin, Germany. MuenchRagnhild@web.de
authors.forename: Ragnhild
authors.initials: R
authors.lastname: Münch
mesh_terms: D001424:Bacterial Infections / Q000266:history*; D001432:Bacteriology / Q000266:history*; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008297:Male; D009613:Nobel Prize; D010781:Photography / Q000266:history / Q000295:instrumentation; D014376:Tuberculosis / Q000266:history