A 30-year-old man presents to his physician with a painless ulcer on his penis.An RPR performed on the man is reactive 1:128,and the TP-PA test is positive.This man has an infection with:

Question

Quizplus · Accepted Answer

The painless ulcer on the penis along with a reactive RPR and positive TP-PA test are classic signs of syphilis, caused by Treponema pallidum. Neisseria gonorrhoeae can cause a painful discharge from the urethra in men, but typically does not present with a painless ulcer. Chlamydia trachomatis can cause urethritis or conjunctivitis, but again, typically does not present with a painless ulcer. Mycoplasma hominis can cause urethritis or pelvic inflammatory disease, but does not typically present with genital ulcers.

A 30-Year-Old Man Presents to His Physician with a Painless