| Amedibacillus dolichus |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Bacillota (Firmicutes), Class Erysipelotrichia, Order Erysipelothrichales, Family Erysipelotrichaceae, Genus Amedibacillus,
Amedibacillus dolichus (Moore et al. 1976) Ikeyama et al. 2020, type species of the genus.
Synonyms: Eubacterium dolichum Moore et al. 1976, Absiella dolichum (Moore et al. 1976) Paek et al. 2017.
Amedibacillus dolichus (Moore et al. 1976) Ikeyama et al. 2020, type species of the genus.
Synonyms: Eubacterium dolichum Moore et al. 1976, Absiella dolichum (Moore et al. 1976) Paek et al. 2017.
Gram-positive, thin rods grouped in long chains. The ends of the cells are usually slightly tapered 0.4-0.6 x 1.6-6.0 µm. Non-motile.
Non-spore-forming.
Non-spore-forming.
After incubation for 5 days in RGCA roll tubes, subsurface colonies are 0.2-0.5 mm in
diameter, lenticular, and transparent to translucent. Surface colonies on BHIA-S roll
streaks are 0.5-1.5 mm in diameter, circular, entire, convex, opaque to translucent,
granular, dull, and smooth. None of the four strains tested grew on anaerobically
incubated BAP. Three of the four strains tested grew on EYA plates but produced no
reaction. Broth cultures produce a stringy to ropy sediment without marked turbidity.
Poor growth in PY broth media. Growth was often enhanced, although the pH was not
necessarily lowered, in PY broth containing fructose, glucose, maltose, starch, or
sucrose. Neither pyruvate nor gluconate was utilized. Best growth was obtained at 37
ºC, although most strains grew at 45 ºC, and there was some growth at 30 ºC. After
incubation for 5 days, the lowest pH observed in carbohydrate media was 5.9 to 6.0.
Growth occurs on medium containing 20% (w/v) bile. Obligately anaerobic.
diameter, lenticular, and transparent to translucent. Surface colonies on BHIA-S roll
streaks are 0.5-1.5 mm in diameter, circular, entire, convex, opaque to translucent,
granular, dull, and smooth. None of the four strains tested grew on anaerobically
incubated BAP. Three of the four strains tested grew on EYA plates but produced no
reaction. Broth cultures produce a stringy to ropy sediment without marked turbidity.
Poor growth in PY broth media. Growth was often enhanced, although the pH was not
necessarily lowered, in PY broth containing fructose, glucose, maltose, starch, or
sucrose. Neither pyruvate nor gluconate was utilized. Best growth was obtained at 37
ºC, although most strains grew at 45 ºC, and there was some growth at 30 ºC. After
incubation for 5 days, the lowest pH observed in carbohydrate media was 5.9 to 6.0.
Growth occurs on medium containing 20% (w/v) bile. Obligately anaerobic.
Isolated from human feces and rectal contents.
Undetermined.
- Moore WEC, Johnson JL, Holdeman LV. Emendation of Bacteriodaceae and Butyrivibrio and descriptions of Desulfomonas gen.
nov. and ten new species in the genera Desulfomonas, Butyrivibrio, Eubacterium, Clostridium, and Ruminococcus. International
Journal of Systematic Bacteriology 1976; 26:238-252. - Ikeyama N, Toyoda A, Morohoshi S, Kunihiro T, Murakami T, Mori H, Iino T, Ohkuma M, Sakamoto M. Amedibacterium intestinale
gen. nov., sp. nov., isolated from human faeces, and reclassification of Eubacterium dolichum Moore et al. 1976 (Approved Lists
1980) as Amedibacillus dolichus gen. nov., comb. nov. Int J Syst Evol Microbiol 2020; 70:3656-3664.
Positive results for acid producion from: glucose (weak and no gas production). The end products from D-glucose are lactate and
butyrate.
Negative results for curd production in milk, esculin hydrolysis, H2S production, starch hydrolysis, acid producion from: adonitol,
amygdalin, arabinose, cellobiose, esculin, fructose, glycogen, galactose, glycerol, inulin, inositol, lactose, maltose, mannitol,
mannose, melibiose, raffinose, rhamnose, ribose, salicin, sorbitol, sorbose, starch, sucrose, trehalose and xylose.
butyrate.
Negative results for curd production in milk, esculin hydrolysis, H2S production, starch hydrolysis, acid producion from: adonitol,
amygdalin, arabinose, cellobiose, esculin, fructose, glycogen, galactose, glycerol, inulin, inositol, lactose, maltose, mannitol,
mannose, melibiose, raffinose, rhamnose, ribose, salicin, sorbitol, sorbose, starch, sucrose, trehalose and xylose.
(c) Costin Stoica
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