Skip to Content


Pronunciation: ak′wă-spī-ril′ŭm

Definition: A genus of motile, nonsporeforming, aerobic bacteria (family Spirillaceae) containing gram-negative, rigid, helical, or helically curved cells that are 0.2–1.5 mcm in diameter. Motile cells contain fascicles of flagella at one or both poles. Some species can grow anaerobically with nitrate instead of oxygen as the terminal electron acceptor. These organisms are chemoorganotrophic, possessing a strictly respiratory metabolism. They do not ferment carbohydrates; a few species can oxidize a limited variety of carbohydrates. The habitat of these organisms is fresh water. The type species is Aquaspirillum serpens.

[L. aqua, water, + spirillum, coil]

Disclaimer: This site is designed to offer information for general educational purposes only. The health information furnished on this site and the interactive responses are not intended to be professional advice and are not intended to replace personal consultation with a qualified physician, pharmacist, or other healthcare professional. You must always seek the advice of a professional for questions related to a disease, disease symptoms, and appropriate therapeutic treatments.
© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.