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What is Soft Chancre?

Description of the disease

Soft chancre is an infectious disease caused by the bacterium Treponema pallidum. It is most commonly transmitted through sexual contact and is predominantly found in tropical and subtropical regions.


  • Acquired soft chancre
  • Congenital soft chancre


Symptoms of soft chancre include the appearance of an ulcer at the site of infection, which is often painless. The ulcer typically appears 3 weeks after infection.


The cause of soft chancre is infection with the bacterium Treponema pallidum, which is transmitted through sexual contact with an infected person.


Diagnosis of soft chancre is done through clinical examination, biopsy of the ulcer, and laboratory tests to detect antibodies to Treponema pallidum.


Treatment of soft chancre involves antibiotics, such as penicillin. In case of penicillin allergy, other antibiotics may be used.


Prevention of soft chancre includes the use of condoms during sexual contact, screening for infection in new sexual partners, and seeking medical attention if an ulcer on the penis or vagina appears.


Soft chancre is treated by a venereologist.

Note: This material is provided for informational purposes only and is not medical advice.