Fig. 28: Scanning Electron Micrograph of the Spirochete Treponema pallidum
Treponema pallidum, the bacterium that causes syphilis, is an example of a spirochete.
By NIAID (Syphilis Bacteria) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons.