what well known sexually transmitted disease is caused by spirochete
Syphilis in Women Sexually Transmitted Diseases (STDs) Picture of Syphilis Syphilis: A sexually transmitted disease caused by Treponema pallidum, a microscopic organism called a spirochete. This worm-like, spiral-shaped organism infects people by burrowing into the moist mucous membranes of the mouth or genitals. From there, the spirochete produces a non-painful ulcer known as a chancre.