| Priestia flexa |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Bacillota (Firmicutes), Class Bacilli, Order Caryophanales, Family Bacillaceae, Genus Priestia, Priestia flexa (Priest et al.
1989 ex Batchelor 1919) Gupta et al. 2020.
Synonym: Bacillus flexus (ex Batchelor 1919) Priest, Goodfellow and Todd 1989.
1989 ex Batchelor 1919) Gupta et al. 2020.
Synonym: Bacillus flexus (ex Batchelor 1919) Priest, Goodfellow and Todd 1989.
Gram-variable, rods, 0.9 µm mean cell width, presenting centrally / paracentrally,
ellipsoidal endospores in unswollen sporangia.
ellipsoidal endospores in unswollen sporangia.
Colonies are opaque and smooth. Grows at pH 4.5-9.5 and in 2-10% NaCl. Growth
temperature 17 to 37 ºC (optimum 30 ºC). Allantoin, urate or NaCl are not required for
growth. Does not grow in medium supplemented with lysozyme (0.001%). No growth
on MacConkey agar. Aerobic. No anaerobic growth.
temperature 17 to 37 ºC (optimum 30 ºC). Allantoin, urate or NaCl are not required for
growth. Does not grow in medium supplemented with lysozyme (0.001%). No growth
on MacConkey agar. Aerobic. No anaerobic growth.
Isolated from feces (poultry) and soil.
Unknown.
- 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. - 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. - Chandna P, Mayilraj S, Kuhad RC. Bacillus paraflexus sp. nov., isolated from compost. Int J Syst Evol Microbiol 2013; 63:4735-
4743. - Liu B, Liu GH, Sengonca C, Schumann P, Wang MK, Xiao RF, Zheng XF, Chen Z. Bacillus taiwanensis sp. nov., isolated from a soil
sample from Taiwan. Int J Syst Evol Microbiol 2015; 65:2078-2084.
Positive results for caseinase, citrate utilization, beta-galactosidase, gelatinase, methyl red test, oxidase, starch hydrolysis, Tween 20
hydrolysis, urease, acid production from: fructose, D-glucose, glycerol, galactose, lactose, maltose, D-mannitol, melibiose, raffinose,
starch, sucrose and trehalose.
Negative results for arginine dihydrolase, deamination of phenylalanine, hydrolysis of esculin, hydrolysis of hippurate, H2S production,
egg yolk reaction, indole production, lysine decarboxylase, nitrate reduction, ornithine decarboxylase, Voges-Proskauer reaction,
degradation of tyrosine, acid production from: N-acetylglucosamine, amygdalin, L-arabinose, adonitol, dulcitol, erythritol, D-mannose,
melezitose, rhamnose, ribose, sorbitol, D- and L-xylose.
Variable results for Tween 80 hydrolysis, acid production from: cellobiose, meso-inositol and salicin.
hydrolysis, urease, acid production from: fructose, D-glucose, glycerol, galactose, lactose, maltose, D-mannitol, melibiose, raffinose,
starch, sucrose and trehalose.
Negative results for arginine dihydrolase, deamination of phenylalanine, hydrolysis of esculin, hydrolysis of hippurate, H2S production,
egg yolk reaction, indole production, lysine decarboxylase, nitrate reduction, ornithine decarboxylase, Voges-Proskauer reaction,
degradation of tyrosine, acid production from: N-acetylglucosamine, amygdalin, L-arabinose, adonitol, dulcitol, erythritol, D-mannose,
melezitose, rhamnose, ribose, sorbitol, D- and L-xylose.
Variable results for Tween 80 hydrolysis, acid production from: cellobiose, meso-inositol and salicin.
(c) Costin Stoica
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