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Medical Term:


Pronunciation: spi'ro-ke-ta'lez


An order of bacteria containing slender, flexuous cells, 6–500 mcm in length, in the form of spirals with at least one complete turn. Some species may have an axial filament, a lateral crista, or ridge, or transverse striations. All these organisms are motile, whirling or spinning about the long axis, thus driving the organism forward or backward. Free-living, saprophytic, and parasitic forms occur. The type family is Spirochaetaceae.

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.