It is caused by a bacteria called Haemophilus ducreyi. The incubation period is from 3-7 days but it can range from 1 to 14 days. Initially a red bump appears and it can progress to an ulcer after 2-3 days. They can be found in various sites; in females they can be found in vulva, vagina, perianal area and in males in prepuce, coronal sulcus and anus. Other symptoms such as inguinal lymphadenopathy can occur. Chancroid can be managed by the use of antibiotics. It is sexually acquired even through oral sex. Auto-inoculation may also occur. Such an infection is common in Africa, S.W Asia, South America and Caribbean. It is commonly associated with sex workers, drug use, HIV infection and uncircumcised males.

Partner notification: all sexual contact within 10 days of disease have to be examined and offered treatment.