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Syphilis is a [[sexually transmitted disease]] caused by the [[bacteria]] [[Treponema pallidum|Treponema pallidum]]. Syphilis originated in the [[New World]] and was introduced to [[Europe]] in the late 15th century by explorers returning from the New World<ref>[http://www.archaeology.org/9701/newsbriefs/syphilis.html Origins of Syphilis]</ref>. The first European record of a syphilis epidemic was in 1493, a year after the explorer [[Columbus]] discovered [[America]].

Syphilis is a [[sexually transmitted disease]] caused by the [[bacteria]] ''Treponema pallidum''. Syphilis originated in the [[New World]] and was introduced to [[Europe]] in the late 15th century by [[Spain|Spanish]] explorers returning from the New World. <ref>[http://www.archaeology.org/9701/newsbriefs/syphilis.html Origins of Syphilis]</ref>. The first European record of a syphilis epidemic was in 1493, a year after the explorer [[Columbus]] discovered [[America]].

==Causes, incidence, and risk factors==

==Causes, incidence, and risk factors==