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] .

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, muscles, …

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

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

Mar 6, 2026 · Syphilis is a systemic disease caused by T. pallidum. The disease has been divided into stages on the basis of clinical findings, which guide treatment and follow-up. Persons who have …

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 …

May 6, 2022 · Syphilis is caused by the bacteria Treponema pallidum and is transmitted through sexual contact. It can be hard to diagnose, but without treatment, it can cause serious damage to multiple …

Dec 17, 2025 · Here's what syphilis is, how to recognize it, how it spreads and why timely treatment can cure it fully.