Inflammation of the genital organs, caused by the bacterium Haemophilus ducreyi. This disease occurs mainly in the tropics and subtropics and is very rarely encountered in Britain. The symptoms of soft sore are soft, painful ulcers or pustules (chancres) on the penis, on or around the labia of the vulva, and around the anus. The pus coming from the ulcers is contagious and the disease is transferred to others through sexual intercourse or manual contact. Following infection, women are less likely to display symptoms than men. If not treated, the ulceration continues, and swellings occur in the lymph nodes of the groin.