If other bacterial culprits of Crohn’s found in the gut are also found in the mouth, this might allow researchers to develop better tests that only need a saliva sample to diagnose the disease.

Bacteria in your mouth may be linked to an increased risk of dementia, experts find Certain bacteria found in people's mouths may be linked to changes in brain function as you age, experts have ...

“Each person has maybe 100 to 200 of those bacterial species colonizing their mouth at any given time,” says Wenyuan Shi, a microbiologist at the University of California, Los Angeles.