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Scientific classification
Domain: Bacteria
Phylum: Proteobacteria
Class: Betaproteobacteria
Order: Nitrosomonadales
Family: Spirillaceae
Genus: Spirillum
Ehrenberg, 1832 emend. Podkopaeva et al., 2009

Spirillum is a genus of Gram-negative bacteria within family Spirillaceae.[1][2][3] There are two species in Spirillum with standing in nomenclature, Spirillum winogradskyi and Spirillum volutans.[4] The taxonomic position of three other species provisionally bearing the Spirillum genus name (Spirillum minus, Spirillum pleomorphum, and Spirillum pulli) is uncertain and these have no standing in nomenclature.[1][5]


Members of Spirillum are large, elongate, spiral shaped, rigid cells.[5] Some have tufts of flagella at both poles. They are microaerophilic and usually found in stagnant freshwater rich in organic matter.[5]


The bacterium provisionally named Spirillum minus is associated with rat-bite fever.[6]


  1. ^ a b Garrity, George M.; Brenner, Don J.; Krieg, Noel R.; Staley, James T. (eds.) (2005). Bergey's Manual of Systematic Bacteriology, Volume Two: The Proteobacteria, Part C: The Alpha-, Beta-, Delta-, and Epsilonproteobacteria. New York, New York: Springer. pp. 354–361. ISBN 978-0-387-24145-6.
  2. ^ Spirillum at the US National Library of Medicine Medical Subject Headings (MeSH)
  3. ^ Podkopaeva (D.), Grabovich (M.), Kuever (J.), Lysenko (A.M.), Tourova (T.P.), Kolganova (T.V.) and Dubinia (G.): Proposal of Spirillum winogradskyi sp. nov., a novel microaerophilic species, an amended description of the genus Spirillum and Request for an Opinion regarding the status of the species Spirillum volutans Ehrenberg 1832. Int. J. Syst. Evol. Microbiol., 2009, 59, 2916-2920.
  4. ^ Jean, Euzeby. "Spirillum". List of Prokaryotic names with Standing in Nomenclature. Retrieved November 5, 2014. 
  5. ^ a b c Krieg, Noel (2006). "Chapter 3.2.5: The Genus Spirillum". In Dworkin, Martin; Falkow, Stanley; Rosenberg, Eugene; Schleifer, Karl-Heinz; Stackebrandt, Erko. The Prokaryotes: A Handbook on the Biology of Bacteria, Volume 5. Berlin: Springer Science & Business Media. ISBN 9780387254951. 
  6. ^ "Spirillum" at Dorland's Medical Dictionary

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