Faecalicoccus pleomorphus
Taxonomy
Morphology
Cultural characteristics
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Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Faecalicoccus, Faecalicoccus
pleomorphus
De Maesschalck et al. 2014.
Old synonym:
Streptococcus pleomorphus Barnes et al. 1979.
Gram-positive, pleomorphic cocci, occurring singly, in pairs and short chains; size
and shape may vary considerably according to the medium and conditions of growth.
May become Gram-negative within 24 hours.
2 to 3 mm in diameter, circular, convex colonies, with an irregular edge. On VL blood
agar some strains may be weak beta-hemolytic. Growth in broth is flocculent.
Anaerobic, no growth occurring in air or air containing 10% CO
2. No growth at 20 ºC,
good growth at 37 and 45 ºC.
Isolated from the intestines of birds (chickens, turkeys, ducks) and occasionally human faeces.
Unknown.
  1. Barnes (E.M.), Impey (C.S.), Stevens (B.J.H.) and Peel (J.L.): Steptococcus pleomorphus sp. nov.: an anaerobic streptococcus
    isolated mainly from the caeca of birds. Journal of General Microbiology, 1977, 102, 45-53.
  2. Holt J.G., Krieg N.R., Sneath P.H.A., Staley J.T. and Williams S.T., 1994. Bergey's Manual of Determinative Bacteriology, Ninth
    Edition, Williams & Wilkins, A Waverly Company, Baltimore, pp 527-558.
  3. EUZÉBY (J.P.): List of Bacterial Names with Standing in Nomenclature: a folder available on the Internet. Int. J. Syst. Bacteriol.,
    1997, 47, 590-592. (List of Prokaryotic names with Standing in Nomenclature. https://www.bacterio.net).
Acid is produced from glucose, fructose and usually mannose.
Acid is not produced from arabinose, cellobiose, dextrin, galactose, inositol, lactose, maltose, mannitol, salicin, starch, sucrose &  
xylose.
Catalase-negative, gelatin is not liquefied, indole is not produced,  nitrates are not reduced. H
2S production is weak.
Glucose is fermented by homolactic fermentation to L-lactic acid. Gas is not produced. Small quantities of butyric, formic and
sometimes acetic and succinic acids may be produced.
(c) Costin Stoica
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