Syphilis is an infection caused by bacteria. Most often, it spreads through sexual contact. The disease starts as a sore that's often painless and typically appears on the genitals, rectum or mouth. Syphilis …

Jan 30, 2025 · This page answers basic questions about syphilis, including how to prevent and treat it.

Syphilis (/ ˈsɪfəlɪs, ˈsɪfɪlɪs /) is a sexually transmitted infection caused by the bacterium Treponema pallidum subspecies pallidum. [1] .

Dec 27, 2022 · Syphilis is a sexually transmitted infection (STI) that’s treatable with medication. Without treatment, syphilis causes serious health problems. It can permanently damage your heart, brain, …

May 29, 2025 · WHO fact sheet on syphilis, including overview, symptoms, treatment, prevention and WHO response.

Aug 4, 2025 · Syphilis is caused by the spirochete Treponema pallidum and is characterized by 3 sequential symptomatic stages separated by periods of asymptomatic latent infection. Common …

Feb 26, 2026 · Syphilis is a highly contagious disease usually spread by sexual activity. Learn more about syphilis causes, symptoms, diagnosis, treatment, and prevention.

Syphilis is bacterial infection most often transmitted through sexual contact. The disease progresses through several stages, each characterized by its own set of symptoms.

Syphilis is a sexually transmitted infection (STI) caused by the bacterium Treponema pallidum. Untreated infection can lead to long-term health problems, including brain disease.

Syphilis is a sexually transmitted infection (STI). Find out what the symptoms are, when and where to get medical help and how it's treated.