2. TAXONOMIC DESCRIPTION
Many species have lipid inclusions of poly-beta-hydroxybutyric acid which can be seen with the addition of Sudan dyes. They do have sheaths. The contain typical polar flagella and has a distinct corkscrew appearance. The metabolism is microaerophilic, growth is inhibited by normal levels of oxygen. Growth is best at a neutral conditions. This organism is a chemoorganotrophic.
These species prefer stagnant freshwater. Some species may live in animal or human blood (S. minor). Spirillum minor is also the cause of one type of rat-bite fever.
Stolp, Heinz. 1988. Microbial Ecology: Organism Habitat and Activity. Cambridge University Press. New York. 307 pp.
Holt, J.G., N.R. Krieg, P.H.A. Sneath, J.T. Staley, and S.T. Williams. 1994. Bergey's Manual of Determinative Bacteriology. Ninth Edition. Williams and Wilkins. Baltimore, Maryland. 787 pp.
Starr, Mortimer, ed. 1981. The Prokaryotes. Springer-Verlag Berlin Heidelberg. New York. 1101 pp.
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