What is Chancroid Infection?

Chancroid infection, also known as soft chancre or ulcus molle, is a relatively rare sexually transmitted infection (STI) caused by the bacteria Haemophilus ducreyi. It causes painful sores that can infect more than one part of the genital area. It is very contagious and can be spread through any kind of sexual contact, including oral, vaginal, or anal.

Signs & Symptoms

The most common symptom of chancroid infection is a painful ulcer or sore in the genital area. The ulcer is usually 1-2 cm in diameter and can be surrounded by swollen lymph nodes. Other symptoms may include:

  • Tender, enlarged lymph nodes in the groin area
  • Itching or burning in the genital area
  • Pain during urination
  • Abnormal discharge from the genital area


Chancroid infection is caused by the bacteria Haemophilus ducreyi. This bacteria is spread through sexual contact with the infected area of the body, including oral, vaginal, and anal contact. It is very contagious and can even be spread through contact with an infected person’s clothing, towel, or bedding.


Chancroid infection is diagnosed by examining the affected area and taking a sample of the discharge for laboratory testing. The laboratory test will look for the bacteria that causes chancroid. It is important to note that some people will not show any symptoms of chancroid infection, so it is important for people who are sexually active to get tested regularly.


Chancroid infection can be treated with antibiotics. The most common antibiotic used to treat chancroid is azithromycin, but other antibiotics may be used, depending on the specific case. In addition, all of the affected person’s sexual partners should be tested and treated for chancroid infection to avoid re-infection.


The best way to prevent chancroid infection is to practice safe sex. This includes using protection during any sexual contact, getting tested regularly, and avoiding contact with the infected area or body secretions. It is also important to inform your sexual partner about any STIs that either of you may have had in the past, so that they can be tested and treated if necessary.