Borrelia burgdorferi
- Kaitlyn Joyce provides information on this bacterium that causes Lyme Disease, its classification, habitat, nutrition, adaptation and its life cycle involving two host species.
- http://acadweb.uwlax.edu/07Spring/SAH/BIO203/joyce_kait/

Spirochaete
- Information from Wikipedia on this phylum of gram-negative bacteria, members of which are responsible for several serious diseases.
- http://en.wikipedia.org/wiki/Spirochaete

Treponema pallidum
- Information on this spirochete bacterium, the causal agent of syphilis, and a video from the Microbiology Video Library.
- http://www.microbiologybytes.com/video/Tpallidum.html