which sexually transmitted infection (sti) is caused by treponema pallidum?
Syphilis is a sexually transmitted infection (STI) caused by a spirochaete bacterium, Treponema pallidum. Syphilis has many alternate names, including lues, syph, the Pox.. Note: The above text is excerpted from the Wikipedia article Syphilis, which has been released under the GNU Free Documentation License.