Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Chancroid ?
    ### Response:
    Chancroid is a bacterial infection that is spread through sexual contact. It is caused by a type of bacteria called Haemophilus ducreyi. Chancroid is characterized by a small bump on the genital which becomes a painful ulcer. Men may have just one ulcer, but women often develop four or more.
    