Bifidobacterium dentium is a species of bacteria in the genus of 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.
B. dentium has been identified by researchers at Baylor College of Medicine and Texas Children's Hospital as producing a neurotransmitter that may play a role in preventing or treating inflammatory bowel diseases such as Crohn's disease.