- A dictionary of medical eponyms

Ducrey-Krefting bacillus

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Small (0,5µ broad, 1,5 µ long), gram negative, non-motile, rod-shaped, organism found in pairs, the cause of the chancroid or soft chancre. Belongs to the genus Haemophilus of the family of Brucellacae.


  • A. Ducrey:
    Il virus dell’ulcera venera.
    Gazz internat d sci med, Napoli, 1889, 11: 44. Experimentelle Untersuchungen über den Ansteckungsstoff des weichen Schankers und über die Bubonen.
    Monatshefte für praktische Dermatologie, 1889, 9: 387-405.

  • Paul Gerson Unna, in:
    Monatshefte für praktische Dermatologie, Hamburg, 1892, 14: 485.
  • R. Krefting:
    Ueber die für ulcus molle specifische Mikrobe.
    Archiv für Dermatologie und Syphilis, Berlin, 1892, 2. Ergänzungsheft, pp. 41-62.

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