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Acinetobacter radioresistens

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A gram-negative nonmotile aerobic and non-spore forming bacterium involved in human systemic infections and other community acquired bacterial infections.


Acinetobacter radioresistens is a non-fermentative pleomorphic and coccobacilli radiation resistant bacterium. It is also a commensal bacterium identified on the skin of healthy individual and conveys β-lactamase and carbapenemase activities. In culture media shows a smooth, convex, entire glistening, opaque and yellowish colonies with a pellicle formed in the nutrient broth.

Acinetobacter radioresistens undergo metabolism that is purely respiratory wherein catalase is produced while cytochrome oxidase is not produced as well as indole and hydrogen sulfide and nitrate reduced to nitrite.

Acinetobacter radioresistens is implicated in community acquired bacteremia and systemic local infection to impaired immunologic individual due to HIV infection and has been reveal that the middle ear is the most portal entry of this bacterium into the bloodstream that spread systemically throughout the body.

Scientific classification:

 Kingdom: Bacteria
 Phylum: Proteobacteria
 Class: Gammaproteobacteria
 Order: Pseudomonadales
 Family: Moraxellaceae	
 Genus: Acinetobacter
 Species: Acinetobacter radioresistens

See also:

• Bacteria

• Bacteremia

• Systemic infection