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Syphilis

Electron Microscopy of Treponema Pallidum
This electron micrograph shows Treponema pallidum on cultures of cotton-tail rabbit epithelium cells (Sf1Ep). It is the causative agent of syphilis.
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"Treponema pallidum."
http://en.wikipedia.org/wiki/File:Treponema_pallidum.jpg
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