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Bacteroides barnesiae

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A gram-negative non-spore forming anaerobic and nonmotile pleomorphic rod bacterium associated as beneficial microbes found in gastrointestinal tract of humans and animals.


Bacteroides barnesiae has a size of 0.5-1.4 micrometer wide and 0.8-10.6 micrometer long that is completely anaerobic and grows at temperature of about 37’C which does not require oxygen to survive. It has a cellular fatty acids including C15:0 and iso-C15:0 and in cultured media appears to be circular, raised and grayish-white colonies.

Bacteroides barnesiae is predominantly found in gastrointestinal tract of humans as well as in vertebrate animals where bile is present. It gives benefits to the host if this bacterium strictly retained in the gut by hindering pathogenic microorganisms from forming colonies in the intestines.

Bacteroides barnesiae play a basic role in the breakdown of polysaccharides a complex molecule into small molecules that is used by the bacterium as well as the host in order to utilize the nitrogenous substances and biotransformation of steroids and bile acids.

Scientific classification:

 Kingdom: Bacteria    
 Phylum: Bacteroidetes
 Class: Bacteroidia
 Order: Bacteroidales
 Family: Bacteroidaceae
 Genus: Bacteroides
 Species: Bacteroides barnesiae

See also:

• Bacteria

• Gastrointestinal tract