This is chancroid and it is caused by Haemophilus ducreyi It usually begins when the bacteria enter through a break in the skin. Papules form which become pustular and then ulcerate. The enlarged lymph nodes (buboes) can ulcerate causing a draining, non-healing ulcer. Patients who are diagnosed with chancroid should be tested for other STDs, especially HIV, since the breaks in the skin favor the entry of virus into the body. The organisms that can be seen within mononuclear phagocytes are called Donovan bodies.