US NATIONAL LIBRARY OF MEDICINE / SCIENCE PHOTO LIBRARY US NATIONAL LIBRARY OF MEDICINE / SCIENCE PHOTO LIBRARY
Chancroid. Historical medical illustration showing chancroid ulcers affecting different parts of the penis and pubic region. Chancroid is an infection caused by the Haemophilus ducreyi bacterium. It causes ulcers on the skin and mucous membranes of the genitals and enlargement of the lymph nodes in the groin. From Atlas of Venereal and Skin Diseases by Prince Albert Morrow, published in 1889.
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