'''''Bifidobacterium''''' est [[genus (taxinomia)|genus]] [[Bacteria|bacteriorum]] gramma-positivorum, non motilium, saepe ramosorum, [[Organismus anaerobicus|anaerobicorum]],
quae in [[tractus gastrointestinalis|tractu gastrointestinaligastrenterico]], [[vagina|vaginá]],<ref name="pmid12381787">{{cite journal |author=Schell M. A., Karmirantzou M., Snel B., Vilanova D., Berger B., Pessi G., Zwahlen M. C., Desiere F., Bork P., Delley M., Pridmore R. D., Arigoni F. |title=The genome sequence of Bifidobacterium longum reflects its adaptation to the human gastrointestinal tract. |journal=[[United States National Academy of Sciences|Proceedings of the National Academy of Science U S A.]] |volume= 99|issue= 22|pages=14422–7 |year=2002 |month=October |pmid=12381787 |doi=10.1073/pnas.212527599 |pmc=137899}}.</ref><ref name= MayoB>{{cite book |author= Mayo, B., van Sinderen, D., eds. | year=2010 |title=Bifidobacteria: Genomics and Molecular Aspects | publisher= [[Caister Academic Press]] | isbn= 978-1-904455-68-4}}.</ref> et [[os (oris)|ore]] (''[[Bifidobacterium dentium|B. dentium]]'') habitant.
