| Ralstonia insidiosa |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Betaproteobacteria, Order Burkholderiales, Family Burkholderiaceae, Genus
Ralstonia, Ralstonia insidiosa Coenye et al. 2003, emend. Vaneechoutte et al. 2004.
Ralstonia, Ralstonia insidiosa Coenye et al. 2003, emend. Vaneechoutte et al. 2004.
Gram-negative rods. Motile by one to three polar flagella. Non-spore-forming.
Growth occurs at 28, 32 and 37 ºC and on Burkholderia cepacia-selective agar.
Aerobic.
Aerobic.
Isolated from the sputum of a patient with acute lymphoblastic leukaemia in the USA. Resistant to colistin and desferrioxamine.
Undetermined.
- Coenye (T.), Goris (J.), De Vos (P.), Vandamme (P.) and Lipuma (J.J.): Classification of Ralstonia pickettii-like isolates from the
environment and clinical samples as Ralstonia insidiosa sp. nov. Int. J. Syst. Evol. Microbiol., 2003, 53, 1075-1080. - Vaneechoutte (M.), Kämpfer (P.), De Baere (T.), Falsen (E.) and Verschraegen (G.): Wautersia gen. nov., a novel genus
accommodating the phylogenetic lineage including Ralstonia eutropha and related species, and proposal of Ralstonia
[Pseudomonas] syzygii (Roberts et al. 1990) comb. nov. Int. J. Syst. Evol. Microbiol., 2004, 54, 317-327.
Positive results for catalase, oxidase, lipase, phosphatase, proline aminopeptidase,
pyrrolidonyl aminopeptidase, gamma-L-glutamyl aminopeptidase, nitrate reduction,
oxidative acid production from glucose (glucose fermentation is negative in Coeneye's
study), L-arabinose and xylose.
Can assimilate glucose, gluconate, caprate, adipate, malate and citrate.
Negative results for arginine dihydrolase, alkaline phosphatase, gelatinase, alpha- and beta-glucosidase, beta-galactosidase
(weakly positive results after 48 h incubation), lysine decarboxylase, tryptophan aminopeptidase, N-benzylarginine aminopeptidase,
indole production, acid production from sucrose and mannitol.
No assimilation of arabinose, mannose, mannitol and maltose .
Alkalinization occurs on minimal mineral agar with acetate, allantoin, lactate and malonate, but not with galacturonate, oxalate and
maleate.
Variable results for urease, acid production from glucose and lactose, assimilation of phenylacetate and N-acetylglucosamine.
Biovar 1 is negative for acid production from and assimilation of N-acetylglucosamine, gelatin hydrolysis and mucate on Simmons’
base agar and positive for adipate on API 20NE while biovar 2 strains have the opposite characteristics.
pyrrolidonyl aminopeptidase, gamma-L-glutamyl aminopeptidase, nitrate reduction,
oxidative acid production from glucose (glucose fermentation is negative in Coeneye's
study), L-arabinose and xylose.
Can assimilate glucose, gluconate, caprate, adipate, malate and citrate.
Negative results for arginine dihydrolase, alkaline phosphatase, gelatinase, alpha- and beta-glucosidase, beta-galactosidase
(weakly positive results after 48 h incubation), lysine decarboxylase, tryptophan aminopeptidase, N-benzylarginine aminopeptidase,
indole production, acid production from sucrose and mannitol.
No assimilation of arabinose, mannose, mannitol and maltose .
Alkalinization occurs on minimal mineral agar with acetate, allantoin, lactate and malonate, but not with galacturonate, oxalate and
maleate.
Variable results for urease, acid production from glucose and lactose, assimilation of phenylacetate and N-acetylglucosamine.
Biovar 1 is negative for acid production from and assimilation of N-acetylglucosamine, gelatin hydrolysis and mucate on Simmons’
base agar and positive for adipate on API 20NE while biovar 2 strains have the opposite characteristics.
(c) Costin Stoica
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