Taxonomy
Morphology
Cultural characteristics
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References
Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Enterococcaceae, Enterococcus, Enterococcus cecorum (Devriese et
al. 1983) Williams et al. 1989.
Historical synonym:
Streptococcus cecorum  Devriese et al. 1983.
Gram-positive 1 to 1.3 um in diameter, grouped in pairs, short chains, or small groups.
Nonmotile, nonspore-forming.
Colonies are circular, entire edges, low convex, partially translucent, not pigmented
and reach 1 to 2 mm in diameter after 20 hours and 2 to 3 mm after 2 days at 37 ºC in
CO
2 in air. Growth is slower and less abundant in air. The strains show good growth
anaerobically in an H
2-CO2 atmosphere. Uniform turbidity with a small deposit is
formed in brain heart infusion broth and Todd-Hewitt broth. Alpha-hemolytic on sheep
blood agar.
Good growth occurs at 45 ºC, but no growth occurs at 10 ºC. No growth in in 6.5%
NaCl, on Slanetz–Bartley medium and kanamycin esculin azide agar. Growth at pH
9.6 is slower and less abundant than growth at pH 7.0. Slight inhibition by 40% bile.
Isolated from the ceca of chickens. Cannot survive heating at 60 ºC for 30 min.
The cecal strains were non-pathogenic in chickens experimental infections.
  1. Devriese, L. A., Dutta, G. N., Farrow, J. A. E., Van De Kerckhove, A., Phillips, B. A. Streptococcus cecorum, a New Species Isolated
    from Chickens. Int J Syst Bacteriol 1983 33: 772-776.
  2. Validation of the Publication of New Names and New Combinations Previously Effectively Published Outside the IJSB: List No. 31.
    Int J Syst Bacteriol 1989 39: 495-497.
  3. Pavel Švec and  Luc A. Devriese, 2009: Genus I. Enterococcus (ex Thiercelin and Jouhaud 1903) Schleifer and Kilpper-Bälz 1984,
    32VP in Bergey’s Manual of Systematic Bacteriology, Second Edition, Volume Three, Vos, P.D.; Garrity, G.; Jones, D.; Krieg, N.R.;
    Ludwig, W.; Rainey, F.A.; Schleifer, K.-H.; Whitman, W.B. (Eds.), pp 594-606.
Positive results for alkaline phosphatase, esculin hydrolysis, leucine arylaminidase, beta-glucuronidase, Voges-Proskauer, acid
production from: N-acetylglucosamine, amygdalin, arbutin, cellobiose, fructose, galactose, glucose, beta-gentiobiose, inulin, lactose,
maltose, mannose, melezitose, melibiose, raffinose, ribose, salicin, sucrose & trehalose. Gas is not formed from glucose.

Negative results for gelatinase, tyrosinase, acid production from adonitol, arabinose, arabitol, dulcitol, erythritol, fucose,
alpha-methyl-D-glucoside, glycerol, inositol, lyxose, mannitol, alpha-methyl-D-mannoside, L-rhamnose, sorbitol, L-sorbose,
turanose, xylitol, xylose, or beta-methyl-xyloside.

Variable results for hydrolysis of starch, alpha- and beta-galactosidase.
Enterococcus cecorum
(c) Costin Stoica
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