Syphilis is a sexually transmitted infection caused by the bacterium Treponema pallidum. Untreated infection can lead to long term health problems, including brain disease. Syphilis increases both transmission and acquisition of HIV. Tests and treatment are available.
Syphilis Fact Sheet (CDC)
Syphilis and Men Who Have Sex with Men (MSM) Fact Sheet (CDC)
Sífilis - Hoja informativa (Español, CDC)
Sífilis y los hombres que tienen relaciones sexuales con hombres - Hoja informativa (Español, CDC)
STD Test Sites
PrEP locator
Teen-friendly STD Information and Health Clinics
Condom Access for Teens
Sign up for Free STD Test Reminder Messages
Assess Your Risk for STDs
Send an Email or Text to Let Your Partners Know They Should Get Tested (TellYourPartner.org)
CDC Division of STD Prevention
American Sexual Health Association
Syphilis Cases Among Women in California
California STD Data
National STD Data