| Heyndrickxia sporothermodurans |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Bacillota (Firmicutes), Class Bacilli, Order Caryophanales, Family Bacillaceae, Genus Heyndrickxia, Heyndrickxia
sporothermodurans (Pettersson et al. 1996) Gupta et al. 2020.
Synonym: Bacillus sporothermodurans Pettersson, Lembke, Hammer, Stackebrandt and Priest 1996.
sporothermodurans (Pettersson et al. 1996) Gupta et al. 2020.
Synonym: Bacillus sporothermodurans Pettersson, Lembke, Hammer, Stackebrandt and Priest 1996.
Gram-positive rods, filamentous, 0.7 x 3.4-8.2 to 30 µm long, usually motile by
peritrichous flagella. Produce paracentral / subterminal or terminal, spherical to
ellipsoidal endospores (1.7 µm long) in slightly swollen / unswollen sporangia;
sporulation is rare but can be enhanced by using BHI-soil extract agar supplemented
with vitamin B12 and MnSO4.
peritrichous flagella. Produce paracentral / subterminal or terminal, spherical to
ellipsoidal endospores (1.7 µm long) in slightly swollen / unswollen sporangia;
sporulation is rare but can be enhanced by using BHI-soil extract agar supplemented
with vitamin B12 and MnSO4.
Colonies are smooth or glossy, beige or cream, 1-2 mm in diameter, flat, after 2 days
on BHI agar supplemented with 5 mg/L MnSO4 and 1 mg/L vitamin B12 . Strictly
aerobic. Grow poorly on nutritive agar. Good growth is obtained on BHI agar. Growth
temperature 20-55 ºC, pH 5-9. Grow in 0-5% NaCl, no growth in 7% NaCl. Require
vitamin B12 (cyanocobalamin) for good growth; alantoin or urate are not required.
on BHI agar supplemented with 5 mg/L MnSO4 and 1 mg/L vitamin B12 . Strictly
aerobic. Grow poorly on nutritive agar. Good growth is obtained on BHI agar. Growth
temperature 20-55 ºC, pH 5-9. Grow in 0-5% NaCl, no growth in 7% NaCl. Require
vitamin B12 (cyanocobalamin) for good growth; alantoin or urate are not required.
Strains isolated from UHT treated (135-142 ºC for several seconds) milk grow poorly and sporulate poorly, but their spores show very
high heat resistance. This very high heat resistance may decrease upon subculture. Isolates from farm environments may grow more
readily than UHT milk isolates but be less heat resistant.
high heat resistance. This very high heat resistance may decrease upon subculture. Isolates from farm environments may grow more
readily than UHT milk isolates but be less heat resistant.
Apparently doesn't spoil the milk and is non-pathogenic.
- N.A. Logan and P. De Vos, 2009. Genus I. Bacillus Cohn 1872. 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, 21-127. - B. Pettersson, F. Lembke, P. Hammer, E. Stackebrandt and F.G.Priest, 1996. Bacillus sporothemodurans, a New Species
Producing Highly Heat-Resistant Endospores. IJSB 46, 759-764. - Gupta RS, Patel S, Saini N, Chen S. Robust demarcation of 17 distinct Bacillus species clades, proposed as novel Bacillaceae
genera, by phylogenomics and comparative genomic analyses: description of Robertmurraya kyonggiensis sp. nov. and proposal
for an emended genus Bacillus limiting it only to the members of the Subtilis and Cereus clades of species. Int J Syst Evol
Microbiol 2020; 70:5753-5798.
Positive results for catalase, hydrolysis of esculin, hydrolysis of gelatin, oxidase, nitrate reduction, acid production from: D-glucose, N-
acetyl-D-glucosamine, fructose, maltose, sucrose and trehalose.
Negative results for arginine dihydrolase, caseinase, beta-galactosidase, egg yolk reaction, H2S production, indole production, lysine
decarboxylase, ornithine decarboxylase, hydrolysis of starch, urease, acid production from: L- or D- arabinose, adonitol, D- or L-
arabitol, dulcitol, erythritol, D- or L-fucose, galactose, gluconate, glycogen, meso-inositol, inulin, 2- or 5-ketogluconate, lactose, lyxose,
melibiose, methyl beta-xyloside, raffinose, rhamnose, ribose, sorbitol, sorbose, L- or D-xylose.
Variable results for citrate utilization, Voges-Proskauer, acid production from: amygdalin, arbutin, cellobiose, glycerol, beta-
gentiobiose, D-mannitol, D-mannose, melezitose, salicin, starch and xylitol (weak).
acetyl-D-glucosamine, fructose, maltose, sucrose and trehalose.
Negative results for arginine dihydrolase, caseinase, beta-galactosidase, egg yolk reaction, H2S production, indole production, lysine
decarboxylase, ornithine decarboxylase, hydrolysis of starch, urease, acid production from: L- or D- arabinose, adonitol, D- or L-
arabitol, dulcitol, erythritol, D- or L-fucose, galactose, gluconate, glycogen, meso-inositol, inulin, 2- or 5-ketogluconate, lactose, lyxose,
melibiose, methyl beta-xyloside, raffinose, rhamnose, ribose, sorbitol, sorbose, L- or D-xylose.
Variable results for citrate utilization, Voges-Proskauer, acid production from: amygdalin, arbutin, cellobiose, glycerol, beta-
gentiobiose, D-mannitol, D-mannose, melezitose, salicin, starch and xylitol (weak).
(c) Costin Stoica
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