| Caldibacillus debilis |
Taxonomy
Morphology
Growth conditions
Biochemical characters
Ecology
Pathogenicity
References
Phylum Bacillota (Firmicutes), Class Bacilli, Order Caryophanales, Family Bacillaceae, Genus Caldibacillus, Caldibacillus debilis
(Banat et al. 2004) Coorevits et al. 2012, type species of the genus.
Synonyms: Geobacillus debilis Banat et al. 2004.
(Banat et al. 2004) Coorevits et al. 2012, type species of the genus.
Synonyms: Geobacillus debilis Banat et al. 2004.
Gram-negative rods, 0.5-1.0 x 1.0-14.0 µm, occuring singly, in pairs or chains. Motile.
Spores are sparsely produced, terminally, not swelling the sporangium.
Spores are sparsely produced, terminally, not swelling the sporangium.
Colonies flat, cream-coloured with smooth margins. Growth occurs at 50-70 ºC, with
an optimum above 60 ºC. Can grow at pH 9, not at pH 5. No growth in 1% or 5% NaCl.
Obligate aerobe.
an optimum above 60 ºC. Can grow at pH 9, not at pH 5. No growth in 1% or 5% NaCl.
Obligate aerobe.
Isolated from 50 mm undisturbed subsurface soil samples from Northern Ireland.
Unknown (none).
- Banat IM, Marchant R, Rahman TJ. Geobacillus debilis sp. nov., a novel obligately thermophilic bacterium isolated from a cool soil
environment, and reassignment of Bacillus pallidus to Geobacillus pallidus comb. nov. Int J Syst Evol Microbiol 2004; 54:2197-2201. - Coorevits A, Dinsdale AE, Halket G, Lebbe L, De Vos P, Van Landschoot A, Logan NA. Taxonomic revision of the genus Geobacillus:
emendation of Geobacillus, G. stearothermophilus, G. jurassicus, G. toebii, G. thermodenitrificans and G. thermoglucosidans (nom.
corrig., formerly 'thermoglucosidasius'); transfer of Bacillus thermantarcticus to the genus as G. thermantarcticus comb. nov.;
proposal of Caldibacillus debilis gen. nov., comb. nov.; transfer of G. tepidamans to Anoxybacillus as A. tepidamans comb. nov.; and
proposal of Anoxybacillus caldiproteolyticus sp. nov. Int J Syst Evol Microbiol 2012; 62:1470-1485.
Positive results for aesculin hydrolysis, oxidase, acid production from: N-acetylglucosamine, amygdalin, arbutin (weak), fructose,
galactose, glucose, gentibiosse, lactose, salicin, trehalose, turanose (weak) and D-xylose (weak).
Negative results for catalase, citrate utilization, nitrate reduction, ONPG, starch hydrolysis, acid production from: L-arabinose, glycerol,
glycogen, myo-inositol, maltose, mannose, mannitol, melezitose, melibiose, methyl D-glucoside, raffinose, ribose and sucrose.
Variable results for caseinase, gelatinase, Voges-Proskauer test, acid production from: cellobiose and ribose .
galactose, glucose, gentibiosse, lactose, salicin, trehalose, turanose (weak) and D-xylose (weak).
Negative results for catalase, citrate utilization, nitrate reduction, ONPG, starch hydrolysis, acid production from: L-arabinose, glycerol,
glycogen, myo-inositol, maltose, mannose, mannitol, melezitose, melibiose, methyl D-glucoside, raffinose, ribose and sucrose.
Variable results for caseinase, gelatinase, Voges-Proskauer test, acid production from: cellobiose and ribose .
(c) Costin Stoica
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