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The page below is a sample from the LabCE course Sexually Transmitted Bacterial Infections (by ASCLS). Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Haemophilus ducreyi Symptoms

  • Small lesion(s) on the genitals appear within one day to two weeks after exposure
    • Lesion ulcerates within a day of appearance
    • Size ranges from 1/8 inch to 2 inches across
    • Lesion is soft, painful with a sharply defined border

    • Edges are jagged and covered in yellowish-gray material

  • About half of infected men have only one ulcer

  • Women frequently have 4 or more ulcers

  • Half of those infected infected will develop enlarged inguinal lymph nodes
PHIL CDC Susan Lindsey
  • In half of the people who have swollen inguinal lymph nodes, the nodes will break through the skin and cause draining abscesses called buboes
PHIL CDC Susan Lindsey