RT Book, Section A1 Tuddenham, Susan A. A1 Zenilman, Jonathan M. A2 Kang, Sewon A2 Amagai, Masayuki A2 Bruckner, Anna L. A2 Enk, Alexander H. A2 Margolis, David J. A2 McMichael, Amy J. A2 Orringer, Jeffrey S. SR Print(0) ID 1161341272 T1 Syphilis T2 Fitzpatrick's Dermatology, 9e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9780071837798 LK accessmedicine.mhmedical.com/content.aspx?aid=1161341272 RD 2024/04/19 AB AT-A-GLANCEA disease caused by the spirochete Treponema pallidum subspecies pallidum that is almost exclusively sexually transmitted.In the United States, syphilis disproportionately affects men who have sex with men and African American heterosexual communities.The most common and recognizable manifestations are usually cutaneous.Syphilis passes through 4 distinct clinical phases:Primary stage, characterized by a chancre.Secondary stage, characterized typically by skin eruption(s) with or without lymphadenopathy and organ disease.A latent period of varied duration, characterized by the absence of signs or symptoms of disease, with only reactive serologic tests as evidence of infection.Tertiary stage, with cutaneous, neurologic, or cardiovascular manifestations.Neurosyphilis and ophthalmic syphilis can occur at any stage.The recommended treatment for most types of syphilis is benzathine penicillin G, with dose and administration schedule determined by disease stage.Any patient diagnosed with syphilis should be tested for other sexually transmitted infections, including HIV.