Acute ulcerative sexually transmitted infection caused by Hemophilus ducreyi.
Most commonly seen in the tropics and subtropics.
More common in lower socioeconomic levels of society.
More common among males frequenting prostitutes.
A cause of genital ulcer disease and lymphadenopathy.
The time from infection during sexual contact to the onset of signs and symptoms is typically 4–10 days (range 1–35 days).
Associated with one or more deep, painful genital or perianal ulcers with tender inguinal adenopathy.
One of most common causes of genital ulcers in Africa and Southeast Asia.
An important cofactor in the transmission of HIV infection.
Increasing in incidence in the U.S.
Underdiagnosed disease.