Differential characters of hemolytic Acinetobacter species:
 
DL-Lactate
utilization
Azelate
utilization
Beta-Alanine
utilization
Malonate
utilization
L-Arginine
utilization
Benzoate
utilization
Adipate
utilization
A. haemolyticus
-
-
-
-
+
-
-
A. junii
+
-
-
-
+
+
-
A. beijerinckii
-
-
-
+
-
-
-
A. gyllenbergii
+
+
+
d
+
+
+
A. venetianus
-
-
-
+
+
+
-
A. tjernbergiae
-
-
-
-
+
+
-
Legend: +  positive 90-100%, - negative 90-100%, [+] positive 75-89%, [-] negative 75-89%, d positive 25-74% of strains
Acinetobacter junii
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Pseudomonadales, Family Moraxellaceae, Genus Acinetobacter,
Acinetobacter junii  
Bouvet and Grimont 1986.
Synonym:
Acinetobacter grimontii Carr et al. 2003.
Gram-negative rods (0.9-1.6–1.5 x 1.5–2.5 μm), becoming spherical in the stationary
phase of growth. Grouped in pairs or chains. Nonmotile but may display “twitching
motility”. Nonsporulated.
Colonies on Tryptocasein soy agar are circular, convex, smooth, and slightly opaque
with entire margins; 1.0 to 1.5 mm in diameter after 24 h and 2.0 to 2.5 mm in
diameter after 48 h at 30 ºC. Good growth occurs at 15 to 30 ºC; variable growth at 41
ºC; no growth occurs at 44 ºC. Aerobic. Nonhemolytic. No growth factor is required.
Isolated from human clinical specimens. A. grimontii strain was isolated from activated sludge.
Unknown. May be involved in nosocomial infections.
  1. Elliot Juni and Kjell Bovre. Order IX Pseudomonadales Orla-Jensen 1921, Family II Moraxellaceae Rossau, Van Landschoot,
    Gillis and De Ley 1991 In:  Bergey’s Manual of Systematic Bacteriology, Second edition,Vol two, part B, George M. Garrity (Editor-in-
    Chief), pp. 411-442.
  2. Philippe J. M. Bouvet and Patrick A. D. Grimont. Taxonomy of the Genus Acinetobacter with the Recognition of Acinetobacter
    baumannii sp. nov., Acinetobacter haemolyticus sp. nov., Acinetobacter johnsonii sp. nov., and Acinetobacter junii sp. nov. and
    Emended Descriptions of Acinetobacter calcoaceticus and Acinetobacter lwoffii. Int J Syst Bacteriol April 1986 36:228-240.
  3. Mario Vaneechoutte, Thierry De Baere, Alexandr Nemec, Martin Musílek, Tanny J. K. van der Reijden, and Lenie Dijkshoorn.
    Reclassification of Acinetobacter grimontii Carr et al. 2003 as a later synonym of Acinetobacter junii Bouvet and Grimont 1986. Int
    J Syst Evol Microbiol April 2008 58:937-940.
  4. Emma L. Carr, Peter Kämpfer, Bharat K. C. Patel, Volker Gürtler, and Robert J. Seviour. Seven novel species of Acinetobacter
    isolated from activated sludge. Int J Syst Evol Microbiol July 2003 53:953-963.
  5. Alexandr Nemec, Martin Musílek, Martina Maixnerová, Thierry De Baere, Tanny J. K. van der Reijden, Mario Vaneechoutte, and
    Lenie Dijkshoorn. Acinetobacter beijerinckii sp. nov. and Acinetobacter gyllenbergii sp. nov., haemolytic organisms isolated from
    humans . Int J Syst Evol Microbiol January 2009 59:118-124.
Positive results for catalase, utilization of: DL-lactate, L-histidine, D-malate & ethanol.

Negative results for oxidase, nitrates reduction, indole production, H
2S production, phenylalanine deaminase, amylase, DNase,
beta-galactosidase, gelatin hydrolysis, beta-xylosidase gamma-glutamyltransferase, utilization of: glutarate, L-phenylalanine,
phenylacetate, malonate, azelate, histamine, beta-alanine, 2,3-butanediol, trans-aconitate, L-ornithine, D-arabinose, dulcitol,
beta-D-(-)-fructose, glycerol, glycine, glycogene, glycolate, myoinositol, 2-keto-gluconate, 5-keto-gluconate, inulin, alpha-lactose,
maltose, D-mandelate, D-mannitol, D-(+)-mannose, D-(+)-melezitose, D-(+)-raffinose, alpha-L-rhamnose, salicin,  D-sorbitol, starch,
sucrose, D-(+)-trehalose, D-xylitol & L-xylose.
Acid is not produced from D-glucose.

Variable utilization of: citrate (Simmons), L-aspartate, L-leucine, L-tyrosine, L-arginine & DL-4-aminobutyrate.
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