| Priestia paraflexa |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Bacillota (Firmicutes), Class Bacilli, Order Caryophanales, Family Bacillaceae, Genus Priestia, Priestia paraflexa (Chandna
et al. 2013) Gupta et al. 2020.
Synonym: Bacillus paraflexus Chandna et al. 2013.
Species description is based on a single isolate.
et al. 2013) Gupta et al. 2020.
Synonym: Bacillus paraflexus Chandna et al. 2013.
Species description is based on a single isolate.
Gram-positive, short rods with rounded ends, occurring singly or in pairs. Motile.
Produce ellipsoidal endospores located centrally in a swollen sporangium.
Produce ellipsoidal endospores located centrally in a swollen sporangium.
Colonies grown at 30 ºC on Nutrient Agar are translucent with regular margins and
convex elevation, non-pigmented and do not display UV fluorescence. The colony
surface is oval in appearance. Growth occurs at 15-42 ºC (optimal 30 ºC), at pH 5-11;
(optimum pH 7.0) and in 2-10% (w/v) NaCl. Does not grow in medium supplemented
with lysozyme (0.001%). No growth on MacConkey agar. Strictly aerobic.
convex elevation, non-pigmented and do not display UV fluorescence. The colony
surface is oval in appearance. Growth occurs at 15-42 ºC (optimal 30 ºC), at pH 5-11;
(optimum pH 7.0) and in 2-10% (w/v) NaCl. Does not grow in medium supplemented
with lysozyme (0.001%). No growth on MacConkey agar. Strictly aerobic.
Isolated from compost at the University of Delhi South Campus, New Delhi, India.
Susceptible to streptomycin, tetracycline, clindamycin, lincomycin, cefradine, erythromycin, vancomycin, fusidic acid, cefotaxime
and levofloxacin. Resistant to kanamycin, chloramphenicol, oleandomycin, novobiocin, bacitracin and polymyxin B.
Susceptible to streptomycin, tetracycline, clindamycin, lincomycin, cefradine, erythromycin, vancomycin, fusidic acid, cefotaxime
and levofloxacin. Resistant to kanamycin, chloramphenicol, oleandomycin, novobiocin, bacitracin and polymyxin B.
Undetermined.
- Chandna P, Mayilraj S, Kuhad RC. Bacillus paraflexus sp. nov., isolated from compost. Int J Syst Evol Microbiol 2013; 63:4735-
4743. - 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 caseinase, catalase, citrate utilization, gelatinase, alpha-glucosidase, beta-galactosidase (ONPG),
alpha-glucuronidase, lysine decarboxylase, methyl red test, ornithine decarboxylase, starch hydrolysis, tyrosine arylamidase, acid
production from: fructose, D-glucose, melibiose, raffinose, sucrose and trehalose.
Negative results for arginine dihydrolase, aesculin hydrolysis, H2S production, indole production, nitrate reduction, oxidase, Tweens
20, 40, 60 and 80 hydrolysis, Voges-Proskauer test, acid production from: N-acetyl-D-glucosamine, adonitol, amygdalin, arabinose,
cellobiose, cyclodextrin, dulcitol, D-galactose, glycerol, glycine, glycogen, myo-inositol, inulin, lactose, mannose, mannitol,
melezitose, methyl alpha-D-mannoside, methyl alpha-D-glucoside, methyl D-xyloside, methyl alpha-D-glucopyranoside, maltotriose,
palatinose, rhamnose, ribose, sorbose, sorbitol, D-tagatose, xylitol and xylose.
Putrescine is not assimilated.
Contradictory results for urea hydrolysis and acid production from salicin.
alpha-glucuronidase, lysine decarboxylase, methyl red test, ornithine decarboxylase, starch hydrolysis, tyrosine arylamidase, acid
production from: fructose, D-glucose, melibiose, raffinose, sucrose and trehalose.
Negative results for arginine dihydrolase, aesculin hydrolysis, H2S production, indole production, nitrate reduction, oxidase, Tweens
20, 40, 60 and 80 hydrolysis, Voges-Proskauer test, acid production from: N-acetyl-D-glucosamine, adonitol, amygdalin, arabinose,
cellobiose, cyclodextrin, dulcitol, D-galactose, glycerol, glycine, glycogen, myo-inositol, inulin, lactose, mannose, mannitol,
melezitose, methyl alpha-D-mannoside, methyl alpha-D-glucoside, methyl D-xyloside, methyl alpha-D-glucopyranoside, maltotriose,
palatinose, rhamnose, ribose, sorbose, sorbitol, D-tagatose, xylitol and xylose.
Putrescine is not assimilated.
Contradictory results for urea hydrolysis and acid production from salicin.
(c) Costin Stoica
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