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Mollicutes

Mollicutes
Scientific classification Edit this classification
Domain: Bacteria
Phylum: Mycoplasmatota
Class: Mollicutes
Edward and Freundt 1967[1]
Orders

Acholeplasmatales
Anaeroplasmatales
Entomoplasmatales
Haloplasmatales
Mycoplasmatales

Synonyms
  • Culicoidibacteria Neupane et al. 2020
  • Erysipelotrichia Ludwig, Schleifer & Whitman 2010
  • "Erysipelotrichidae" corrig. Cavalier-Smith 2020
  • "Izemaplasma" (sic) Skennerton et al. 2016
  • "Paramycetes" Sabin 1941

Mollicutes is a class of bacteria[2] distinguished by the absence of a cell wall. The word "Mollicutes" is derived from the Latin mollis (meaning "soft" or "pliable"), and cutis (meaning "skin"). Individuals are very small, typically only 0.2–0.3 μm (200–300 nm) in size and have a very small genome size. They vary in form, although most have sterols that make the cell membrane somewhat more rigid. Many are able to move about through gliding, but members of the genus Spiroplasma are helical and move by twisting. The best-known genus in the Mollicutes is Mycoplasma. Colonies show the typical "fried-egg" appearance.

Mollicutes are parasites of various animals and plants, living on or in the host's cells. Many cause diseases in humans, attaching to cells in the respiratory or urogenital tracts, particularly species of Mycoplasma and Ureaplasma. Phytoplasma and Spiroplasma are plant pathogens associated with insect vectors.

Whereas formerly the trivial name "mycoplasma" (plural: "mycoplasmas") has commonly denoted any member of the class Mollicutes, it now in scientific classification refers exclusively to a member of the genus Mycoplasma.

  1. ^ Cite error: The named reference Edward was invoked but never defined (see the help page).
  2. ^ [1] "Mollicutes", from Encyclopædia Britannica Online. Retrieved 15 Oct. 2011.

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