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Acinetobacter beijerinckii

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A gram-negative aerobic bacterium and non-motile coccobacilli that is commonly isolated from human and animal specimen.


Acinetobacter beijerinckii is found mostly in soil, water, respiratory specimen as well as in hospital environments. It is known as hemolytic and non-glucose acidifying and has the ability to grow in L-arginine and it is oxidase negative while catalase positive capable to grow in mineral medium with acetate as a carbon source and ammonia as a source of nitrogen though it is incompetent of dissimilative dentrification.

Acinetobacter beijerinckii formed colonies in tryptone soya agar characterized by convex, circular, smooth and slightly opaque with a diameter ranging from 1.0-2.0 micrometer having an entire margins where it grows best at temperature from 25-37’C.

Acinetobacter beijerinckii is normally originated from human and animal specimens as well from various environmental sources. Its phenotypic characteristic has been used for the differentiation of these species from other Acinetobacter.

Scientific classification:

 Kingdom: Bacteria
 Phylum: Proteobacteria
 Class: Betaproteobacteria
 Order: Neisseriales
 Family: Neisseriaceae	
 Genus: Neisseria
 Species: Acinetobacter beijerinckii

See also:

• Bacteria

• Haemolysis