Taxonomy
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References
Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Enterococcaceae, Genus Enterococcus, Enterococcus durans  (ex
Sherman and Wing 1937) Collins et al. 1984.
Lancefield group D.
Later synonym:
Streptococcus durans (ex Sherman and Wing 1937) Knight et al. 1984.
Gram-positive, ovoid, elongated cells grouped in pairs or short chains. Nonmotile.
Colonies on blood agar or nutrient agar are circular, smooth, and entire.
Nonpigmented. Alpha-, sometimes beta-hemolytic (on horse blood media).
Amino acids and B vitamins are required for growth in synthetic media. Grows on
0.1% methylene blue milk. No growth in media containing 0.04% tellurite and 0.01%
tetrazolium. Grow at 10 ºC but not at 45 ºC. Grow in the presence of  6.5% NaCl.
Isolated from milk, dairy products, meat products and contaminated water.
Unknown (none).
  1. Pavel Svec 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.
  2. M. D. Collins, D. Jones, J. A. E. Farrow, R. Kilpper-Balz, and K. H. Schleifer. Enterococcus avium nom. rev., comb. nov.; E.
    casseliflavus nom. rev., comb. nov.; E. durans nom. rev., comb. nov.; E. gallinarum comb. nov.; and E. malodoratus sp. nov. Int J Syst
    Bacteriol April 1984 34:220-223.
  3. L.A. Devriese, M. Vancanneyt, P. Descheemaeker, M. Baele1, H.W. Van Landuyt, B. Gordts, P. Butaye, J. Swings, F. Haesebrouck.
    Differentiation and identification of Enterococcus durans, E. hirae and E. villorum. Journal of Applied Microbiology Volume 92, Issue
    5, pages 821–827, May 2002.
  4. D. A. Singer, E. M. Jochimsen, P. Gielerak and W. R. Jarvis. Pseudo-outbreak of Enterococcus durans infections and colonization
    associated with introduction of an automated identification system software update. J. Clin. Microbiol. November 1996 vol. 34 no. 11
    2685-2687.
Enterococcus durans is phenotypically very close to Enterococcus faecium.
Positive results for Voges-Proskauer test, hydrolysis of esculin, pyrrolidonylarylamidase, arginine dihydrolase, acid production from:
amygdalin, arbutin, fructose, glucose, galactose, lactose, maltose, mannose, ribose & trehalose.

Negative results for catalase, oxidase, alpha-galactosidase, beta-glucuronidase, beta-galactosidase, acid production from: arabinose,
dulcitol, mannitol, melezitose, glycerol, glycogen, inulin, rhamnose, sorbitol, starch & xylose.

Variable results for hydrolysis of hippurate beta-galactosidase, acid production from: melibiose, raffinose & sucrose.
Enterococcus durans
(c) Costin Stoica
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