Spirochaete
（重定向自Spirochaetal）
Spirochaetes English pronunciation:/ˈspʌɪrə(ʊ)kiːt/ (also spelled spirochetes) belong to a phylum of distinctive diderm (double-membrane) bacteria, most of which have long, helically coiled (corkscrew-shaped or spiraled, hence the name) cells. Spirochaetes are chemoheterotrophic in nature, with lengths between 3 and 500 µm and diameters around 0.09 to at least 3 µm.