Spirochete: A microscopic bacterial organism in the Spirochaeta family. Spirochetes have a worm-like, spiral-shaped form, and wiggle vigorously when viewed under a microscope. Treponema pallidum, the cause of syphilis, is a particularly well-known member spirochete.
more information: http://www.ucmp.berkeley.edu/bacteria/spirochetes.html
http://encarta.msn.com/encyclopedia_762510117/spirochetes.html
spiral microorganisms are found in the stomach of pigs and other animals