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Bifidobacterium is a genus of gram-positive, nonmotile, often branched anaerobic bacteria.They are ubiquitous inhabitants of the gastrointestinal tract [2] [3] though strains have been isolated from the vagina [4] and mouth of mammals, including humans.
The Bifidobacteriaceae are the only family of bacteria in the order Bifidobacteriales. [3] According to the 16S rRNA-based LTP release 106 published by 'The All-Species Living Tree' Project, the order Bifidobacteriales is a clade nested within the suborder Micrococcineae, also the genus Bifidobacterium is paraphyletic to the other genera within the family, i.e. the other genera are nested ...
Bifidobacterium bifidum; Close view of Petri dish culture plate containing brain heart infusion (BHI) agar growth medium, inoculated with Bifidobacterium bifidum which, after a 42–72hr incubation period, has developed dewdrop-type bacterial colonies
Representative morphologic characteristics of B. longum subsp. longum strains. Bifidobacterium longum is a Gram-positive, catalase-negative, rod-shaped bacterium present in the human gastrointestinal tract and one of the 32 species that belong to the genus Bifidobacterium.
Bifidobacterium adolescentis has been studied for its health benefits, as strains have been shown to potentially protect against or improve recovery from several diseases, including liver-related, [4] metabolic, [5] allergic airway, [6] colitis, [7] arthritis, [8] and bacterial infections. [9]
Bifidobacterium animalis is a gram-positive, anaerobic, rod-shaped bacterium of the Bifidobacterium genus which can be found in the large intestines of most mammals, including humans.
Bifidobacterium breve is a bacterial species of the genus Bifidobacterium which has probiotic properties. [1] [2] Bifidobacteria are a type of bacteria that live symbiotically in the intestines of humans.
Bifidobacterium dentium is a species of bacteria in the genus Bifidobacterium, branched anaerobic bacteria from the Bifidobacteriaceae family. B. dentium is a source of anaerobic infections, and is also tracked in polluted water to trace the source of fecal contamination. Scientists have shown that B. dentium can cause tooth decay in humans.