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Phylum Firmicutes, Class Erysipelotrichia, Order Erysipelothrichales, Family Erysipelotrichaceae, Genus Erysipelothrix, Erysipelothrix
inopinata
Verbarg, Rheims, Emus, Fruhling, Kroppenstedt, Stackebrandt and Schumann 2004.

Historical synonyms:
Erysipelothrix rhusiopathiae serovar 13 may be included in this species.
Gram-positive (decolorize easy), straight or slightly curved, slender rods, 0.5 x 1.5-3.0
µm, with a tendency to form long filaments (up to 60 µm); occur singly, in short chains,
in pairs at an angle to give V-forms, or in groups with no particular arrangement.  
Nonspore-forming. Nonmotile. Noncapsulated.
Surface colonies on BHI (Difco) after 2 days of incubation are punctiform to 1.5 mm in
diameter, creamy white, undulate, convex, translucent, and soft. Growth occurs also in
Columbia Blood. Beta-hemolysis is not produced. Grow at/on optimum pH 8.
Temperature range 20-40 ºC (optimum 25-30 ºC). No growth at 45 ºC. Facultatively
Isolated from sterile-filtered vegetable broth used for preparation of growth media, Germany.
Undetermined.
  1. Stackebrandt E., 2009. Genus I. Erysipelothrix Rosenbach 1909. In: (Eds.) P.D. Vos, G. Garrity, D. Jones, N.R. Krieg, W. Ludwig, F.
    A. Rainey, K.-H. Schleifer, W.B. Whitman. Bergey’s Manual of Systematic Bacteriology, Volume 3: The Firmicutes, Springer, 1299-
    1306.
  2. Verbarg S., Rheims H., Emus S., Fruhling A., Kroppenstedt R.M., Stackebrandt E. and Schumann P., 2004. Erysipelothrix inopinata
    sp. nov., isolated in the course of sterile filtration of vegetable peptone broth, and description of Erysipelotrichaceae fam. nov.
    IJSEM 54, 221-225.
Positive results for beta-glucosidase acid production from glucose, ribose (weak) &
trehalose. Can utilize: arbutin, cellobiose, gentiobiose, glycerol, salicin & D-trehalose.

Negative results for alkaline phosphatase, aminopeptidase, catalase, casein hydrolysis, esculin hydrolysis, gelatin hydrolysis,
hippurate hydrolysis, oxidase, starch hydrolysis, urea hydrolysis, Voges-Proskauer, acid production from: arabinose, glycogen, lactose,  
maltose, mannitol, melezitose, melibiose, raffinose, sorbitol, sucrose & tagatose. No utilization of: N-acetyl-D-mannosamine,
L-arabinose, D-fructose & D-galactose.
Erysipelothrix inopinata
(c) Costin Stoica
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