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.
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% CO2 . 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.
- 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.
- 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.
(c) Costin Stoica