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Primary Syphilis  Information for adults

Picture of Primary Syphilis: This image displays a painless ulcer with a red base, typical of primary syphilis. Divider line
This image displays a painless ulcer with a red base, typical of primary syphilis.
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Who's At Risk
Syphilis occurs worldwide. In the US, the rates of disease are higher in urban areas and the Southern states. Young adults (aged 15–25) are the highest-risk group for syphilis.

Syphilis is more common in men who have sex with men, sex workers, and people exposed to sex workers; this accounts for the fact that syphilis is seen more commonly in men than women.
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Last Modified: 22 Dec 2008
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