Dictionary > Bifidobacterium longum

Bifidobacterium longum

Rod-shape, gram-positive, catalase-negative bacteria that are considered as an aerotolerant anaerobe which happen to colonize earlier in the gastrointestinal tract of infants.

Bifidobacterium longum in a culture media appears to be white glossy colonies with a convex shape. It is absent in adult intestinal tract yet it is found in the gut for the production of lactic acid to avert growth of pathogenic microorganisms. It comprises at about 90% on an infant’s gastrointestinal tract and slowly drops in adults since other important microflora tend to dominate like Eubacterium and Bacteriodes. It is recognized in the gut by the glycoprotein-binding fimbriae structures and bacterial polysaccharides that has an electrostatic charge to aid adhesion in the intestinal endothelial cells.
Bifidobacterium longum is used as a good source of probiotic in many dairy products that helps to maintain and sustain human gastrointestinal tract. It is associated on some health benefits like improving lactose tolerance, food allergies, preventing diarrhea and hindering pathogen growth. It is also verified to have an antioxidative effect through restraining linoleic acid peroxidation and lowering the possibility to have stroke and atherosclerosis.
It has been revealed that probiotic bacteria Bifidobacterium longum are effective for the treatment of allergic diseases. As histamine plays a central role in allergic diseases and are possible that probiotic bacteria affects the allergy-related histamine signaling, thereby oral administration of Bifidobacterium longum suppressed gene expression followed by the decrease of protein level and histamine content.
Scientific Classification:
Kingdom: Bacteria
Phylum: Actinobacteria
Class: Actinobacteria
Subclass: Actinobacteridae
Order: Bifidobacteriales
Family: Bifidobacteriaceae
Genus: Bifidobacterium
Species: Bifidobacterium infantis
See also:
lactic acid bacteria

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