Halberstaedter and Prowazek with Orangutan, 1907

Halberstaedter and Prowazek with Orangutan, 1907

Ludwig Halberstaedter (left) and Stanislaus von Prowazek (center) conducting an experiment on a visually-impaired man holding a baby orangutan during their research into cytoplasmic inclusion bodies of trachoma. Photograph, c.1907. Trachoma, also called granular conjunctivitis, Egyptian ophthalmia, and blinding trachoma, is an infectious disease caused by the bacteria Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids, which can lead to pain in the eyes and sometimes blindness. Stanislaus Josef Mathias von Prowazek (1875-1915) was a Czech zoologist and parasitologist, who along with pathologist Henrique da Rocha Lima (1879-1956) discovered the pathogen of epidemic typhus. With German-Jewish radiologist Ludwig Halberstädter (1876-1949), he described the inclusion bodies (Halberstädter-Prowazek bodies) of Chlamydia trachomatis, the agent that is the cause of trachoma.

black & white • Science: History

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