Sexually Transmitted Diseases

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Overview

Syphilis is a persistent, highly infectious STD that can have devastating consequences. It is caused by the spiral-shaped bacterium (spirochete) Treponema pallidum, which can live almost anywhere in the body and spreads rapidly. The disease progresses through four distinct stages—primary, secondary, latent, and tertiary—each of which can last for several years. Serious health complications are common and can be fatal in late-stage, or tertiary, syphilis.

Transmission
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