Acinetobacter radioresistens
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Pseudomonadales, Family Moraxellaceae, Genus Acinetobacter,
Acinetobacter radioresistens  
Nishimura et al. 1988.
Gram-negative, pleomorphic cells. A plump form is 0.8-0.9 x 1.2-1.8 μm; elongate
cells (15 μm or more long) occur in young cultures; and coccoid cells (0.6-0.9 μm in
diameter) occur in old cultures. Occur singly or in pairs. Nonmotile. Nonsporeforming.
Noncapsulated.
Colonies on Nutrient agar are smooth, entire, convex, glistening, opaque, and
yellowish white to pale yellow. On nutrient broth surface a pellicle is formed.
Growth occurs in medium containing 5% NaCI. Good growth at 27-31 ºC. Growth
occurs at 42 ºC. Aerobic. Nonhemolytic on sheep blood agar.
Isolated from cotton and soil.
High resistance to gamma-ray irradiation. Resistant to benzylpenicillin (100 IU).
Undetermined.
  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. Yukimasa Nishimura, Takeshi Ino, and Hiroshi Iizuka. Acinetobacter radioresistens sp. nov. Isolated from Cotton and Soil. Int J
    Syst Bacteriol April 1988 38:209-211.
Positive results for catalase, Tween 80 hydrolysis, utilization of: acetate, fumarate, DL-lactate, L-malate, malonate, succinate,
hexadecane, heptadecane, octadecane, eicosane, ethanol, n-butanol, L-alanine, L-glutamate, L-leucine & L-proline.
Nitrate is reduced to nitrite in succinate-nitrate medium but not in casitone-nitrate medium.

Negative results for oxidase, H
2S production, indole production, lysine decarboxydase, ornithine decarboxydase, phenylalanine
deaminase, arginine dihydrolase, gelatinase, urease, utilization of: L-arabinose, D-ribose, D-xylose, D-galactose, D-glucose,
D-fructose, D-mannose , L-rhamnose, D-glucosamine, D-cellobiose, lactose, maltose, melibiose, sucrose, raffinose, citrate,
gluconate, decane, nonadecane, methanol, n-propanol, isopropanol, ethanolamine, beta-alanine, DL-phenylalanine, L-histidine,
L-isoleucine , DL-norleucine, DL-serine, L-threonine, dulcitol, inositol, mannitol & sorbitol.
(c) Costin Stoica
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