Soft chancre - Chancroid

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Sexually transmitted disease caused by a bacterium called Haemophilus ducreyi.

Contagion is favored if the person has a lesion on the skin or chafing. It is more frequent in uncircumcised men and/or men with poor personal hygiene.

It manifests as one or more ulcers on the genital organs, which may be accompanied by a painful lump on the groin. Occasionally this lump may discharge pus.

Diagnosis is clinical by interrogation and genital examination.

Antibiotic treatment should be started early to control the symptoms; for example with unidose treatments of azithromycin or ceftriaxone. If a lot of pus accumulates, a small intervention may be necessary to drain it.

Bibliographic references
  1. Charles B Hicks, MD. Chancroid. Uptodate, Jun 30, 2016.
  2. Lewis DA. Epidemiology, clinical features, diagnosis and treatment of Haemophilus ducreyi - a disappearing pathogen? Expert Rev Anti Infect Ther 2014; 12:687.
  3. The Centers for Disease Control and Prevention. 2014 sexually transmitted disease surveillance. http://www.cdc.gov/std/stats14/tables/44.htm (Accessed on May 12, 2016).
  4. Lewis DA. Diagnostic tests for chancroid. Sex Transm Infect 2000; 76:137.
  5. Timothy F. Murphy.Infecciones por Haemophilus y Moraxella.Harrison. Principios de Medicina Interna, 19e.Capítulo 182.
Author
Dr. Oscar Garcia-Esquirol
Copyright
© TeckelMedical 2026

Symptoms

    Inguinal adenopathies oozing


    Irregular ulcers with dirty appearance


    Several sores on the labia minora


    Lymph nodes are painful to the touch


    Sore bleeds easily if scratched

Symptoms to watch out for

High fever (102.2 ºF or more)
History of immunodeficiency (HIV, Diabetes Mellitus, oncological disorders, long-term corticosteroid consumption).

Self-care

Use condoms for oral, anal, and vaginal intercourse.
Notify your sexual partner or partners so that they can get treated.