| Aeromonas jandaei |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Gammaproteobacteria, Order Aeromonadales, Family Aeromonadaceae, Genus
Aeromonas, Aeromonas jandaei Carnahan et al. 1992.
Formerly genospecies DNA group 9 Aeromonas sobria.
Aeromonas, Aeromonas jandaei Carnahan et al. 1992.
Formerly genospecies DNA group 9 Aeromonas sobria.
Gram-negative, straight rods. Motile by a single polar flagellum. Occurs singly, in
pairs, or chains.
pairs, or chains.
Colonies develop within 24 hours at 28 ºC on TSA and are not pigmented. No brown
water-soluble pigment is produced. Growth occurs on MacConkey agar. Facultatively
anaerobic. Beta-hemolytic on sheep blood agar (sometimes after 2 days incubation).
Mesophilic, growth occurs at temperatures between 4 and 42 ºC, under alkaline (pH
8.5) conditions and in the presence of 0-3% (w/v) NaCl. Does not grow at pH 4.5.
water-soluble pigment is produced. Growth occurs on MacConkey agar. Facultatively
anaerobic. Beta-hemolytic on sheep blood agar (sometimes after 2 days incubation).
Mesophilic, growth occurs at temperatures between 4 and 42 ºC, under alkaline (pH
8.5) conditions and in the presence of 0-3% (w/v) NaCl. Does not grow at pH 4.5.
Isolated from clinical specimens (wounds, blood, and feces) of humans, aquatic sources, fish (eels), and prawns.
Resistant to colistin (4 µg/ml), cephalotin, ampicillin and penicillin. Resistant to vibriostatic agent O/129 (150 µg).
Resistant to colistin (4 µg/ml), cephalotin, ampicillin and penicillin. Resistant to vibriostatic agent O/129 (150 µg).
Mostly virulent for eels and mice. Pathogenicity to mice results in a pathogenic significance for humans. Produce beta-hemolysins
against human red blood cells.
against human red blood cells.
- A. Carnahan, G. R. Fanning, and S. W. Joseph. Aeromonas jandaei (formerly genospecies DNA group 9 A. sobria), a new
sucrose-negative species isolated from clinical specimens. J. Clin. Microbiol. March 1991 29:3 560-564. - Consuelo Esteve, Lazara Valera, Carmen Gutierrez, and Antonio Ventosa. Taxonomic study of sucrose-positive Aeromonas
jandaei-like isolates from faeces, water and eels: emendation of A. jandaei Carnahan et al. 1992. Int J Syst Evol Microbiol
September 2003 53:1411-1419. - Amy Martin-Carnahan and Samuel W. Joseph 2004. Order XII. Aeromonadales ord. nov. In: Bergey’s Manual of Systematic
Bacteriology, Second edition,Vol two, part B, George M. Garrity (Editor-in-Chief), pp. 556-587.
Positive results for catalase, oxidase, nitrates reduction, indole production, ONPG, citrate utilization, acetate utilization, gelatin
hydrolysis, arginine, dihydrolase, lysine decarboxylase, DN-ase, lipase (corn oil), acid production from: fructose, D-galactose,
D-glucose (with gas production), glycerol, maltose, D-mannitol, mannose and D-trehalose.
The sucrose-negative reaction usually differentiates A. jandaei from other Aeromonas.
Negative results for esculin hydrolysis, urea hydrolysis, malonate utilization, elastase, ornithine decarboxylase, acid production from:
L-arabinose, adonitol, D-amygdalin, D-arabitol, dulcitol, erythritol, inositol, D-raffinose, L-rhamnose, D-sorbitol, sucrose and D-xylose.
Variable results for growth in KCN medium, Voges-Proskauer test, H2S production from cysteine thiosulphate, acid production from:
alpha-methyl-D-glucoside, cellobiose, lactose, melibiose and salicin.
hydrolysis, arginine, dihydrolase, lysine decarboxylase, DN-ase, lipase (corn oil), acid production from: fructose, D-galactose,
D-glucose (with gas production), glycerol, maltose, D-mannitol, mannose and D-trehalose.
The sucrose-negative reaction usually differentiates A. jandaei from other Aeromonas.
Negative results for esculin hydrolysis, urea hydrolysis, malonate utilization, elastase, ornithine decarboxylase, acid production from:
L-arabinose, adonitol, D-amygdalin, D-arabitol, dulcitol, erythritol, inositol, D-raffinose, L-rhamnose, D-sorbitol, sucrose and D-xylose.
Variable results for growth in KCN medium, Voges-Proskauer test, H2S production from cysteine thiosulphate, acid production from:
alpha-methyl-D-glucoside, cellobiose, lactose, melibiose and salicin.
(c) Costin Stoica
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