Haemophilus ducreyi (Chancroid)

Noreen A. Hynes, M.D., M.P.H., D.T.M.&H.
Haemophilus ducreyi (Chancroid) is a topic covered in the Johns Hopkins ABX Guide.

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MICROBIOLOGY

  • Fastidious, facultative anaerobic Gram negative coccobacillus.
    • Requires hemin (X factor) for growth but no requirement for NAD (V factor)
    • Three types of nutritionally enriched media needed for growth.
  • Organism co-localizes with neutrophils and fibrin at the ulcerative stage of disease.
  • Specific molecular techniques used to identify likely geographic origin of strains.

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MICROBIOLOGY

  • Fastidious, facultative anaerobic Gram negative coccobacillus.
    • Requires hemin (X factor) for growth but no requirement for NAD (V factor)
    • Three types of nutritionally enriched media needed for growth.
  • Organism co-localizes with neutrophils and fibrin at the ulcerative stage of disease.
  • Specific molecular techniques used to identify likely geographic origin of strains.

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Last updated: August 25, 2013