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 …

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

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

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

Jun 5, 2024 · Syphilis is a sexually transmitted disease. It causes sores on the genitals, rectum, or mouth. Read about testing, prevention, and treatment.

Sep 7, 2025 · Syphilis is a sexually transmitted infection (STI) caused by a bacterium known as Treponema pallidum. The infection spreads through sexual contact and can progress through four …

Syphilis is a sexually transmitted infection (STI) caused by a type of bacteria called Treponema pallidum. It can spread from person to person by physical contact during vaginal, anal, or oral sex.

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, …

Feb 18, 2024 · 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.