Taxonomy
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Phylum Firmicutes, Class Erysipelotrichia, Order Erysipelothrichales, Family Erysipelotrichaceae, Genus Holdemania, Holdemania
filiformis
Willems, Moore, Weiss and Collins 1997. Type species of the genus.
Description is based on a single species isolated.
Historical synonym: Eubacterium group S14.
Gram-positive (easy decolorize) short to long rods, occurring singly and in pairs and
short chains; longer cells may have central to terminal swellings but not spores.  
Nonspore-forming.
Colonies  are low convex, with entire margins, translucent with a granular appearance,
1.0 mm in diameter in BHI agar streak tubes, in anaerobic growth; no growth on the
surface of solid media incubated in air enriched to 10% CO
2 . Cultures in PYT-glucose
broth are turbid with a smooth, white sediment; good growth in this medium with
esculin, fructose, glucose, salicin or sucrose growth in broth media is enhanced by the
addition of Tween 80. Weak growth in 20% bile. Strictly anaerobic.
Isolated from the feces of healthy humans. Resistant to vancomycin.
Undetermined.
  1. Wade W.G. and Downes J., 2009. Genus III. Bulleidia  Downes, Olsvik, Hiom, Spratt, Cheesman, Olsen, Weightman and Wade
    2000 . 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, 1307-1309.
  2. Willems A., Moore W.E.C., Weiss N. and Collins M.D., 1997. Phenotypic and phylogenetic characterization of some Eubacterium-like
    isolates containing a novel type B wall murein from human feces: description of Holdemania filiformis gen. nov., sp. nov. IJSB Vol.
    47, No. 4, p. 1201-1204.
Positive results for esculin hydrolysis, H2S production (weak), acid production from: esculin, fructose, glucose, salicin & sucrose.

Negative results for arginine hydrolysis, catalase, gelatin hydrolysis, indole production, meat digestion, nitrates reduction to nitrites,
urea hydrolysis, acid production from: amygdalin, arabinose, cellobiose, erythritol, glycogen, inositol, mannitol, mannose, melezitose,
melibiose, raffinose, rhamnose, ribose, sorbitol, starch, trehalose & xylose.

Variable results for lactose & maltose fermentation.
Holdemania filiformis
(c) Costin Stoica
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