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oral bacteria

·December 29, 2025·7 min read

Is Your Oral Bacteria Influencing Multiple Sclerosis?

High levels of the periodontal bacterium Fusobacterium nucleatum may be associated with more severe disability in people with multiple sclerosis. Researchers analyzed tongue-coating samples and found that MS patients with the highest abundance of this bacteria had significantly worse scores on a standard disability scale.

Featured Neurology Neuroscience

·October 22, 2025·8 min read

Oral Bacteria May Drive Multiple Sclerosis

Scientists have found that people with multiple sclerosis (MS) have a distinctly imbalanced oral microbiome—marked by a loss of beneficial bacteria and a rise in inflammation-linked microbes. Using advanced genetic and metabolic profiling, researchers revealed that saliva from MS patients also had lower levels of hypotaurine, a molecule that supports antioxidant defense and nerve health.

Featured Neurology Neuroscience

·September 22, 2025·4 min read

Oral Bacteria May Trigger Parkinson’s Disease

Scientists have uncovered a direct link between oral bacteria and Parkinson’s disease. They found that Streptococcus mutans, best known for causing cavities, can settle in the gut and release metabolites that reach the brain.

Featured Neuroscience Psychology

·June 12, 2025·5 min read

Oral Bacteria Diversity Linked to Depression Symptoms

A new study reveals that lower diversity of microbes in the mouth is associated with greater symptoms of depression. Researchers analyzed data from over 15,000 U.S. adults, comparing their mental health surveys with saliva samples to assess microbial diversity.

Featured Neurology Neuroscience

·June 12, 2025·5 min read

Oral-Gut Bacteria Linked to Dementia Risk in Parkinson’s Disease

A new study has found that bacteria from the mouth may migrate to the gut and contribute to cognitive decline in people with Parkinson’s disease. Researchers identified harmful microbes and their toxins in the gut of Parkinson’s patients with dementia, suggesting a possible link between oral hygiene, gut health, and neurodegeneration.

Featured Neurology Neuroscience

·January 30, 2025·5 min read

Oral Bacteria Linked to Stroke Risk

A new study finds that the bacteria Streptococcus anginosus is more abundant in the saliva and gut of people who have had a stroke and is associated with a higher risk of death and major cardiovascular events. Researchers compared 189 stroke patients with 55 non-stroke participants, finding that this bacterium increased stroke risk by 20%.

Featured Neurology Neuroscience

·December 7, 2022·4 min read

A Potential Link Between Oral Bacteria and Brain Abscesses

Previous research has linked oral bacteria and poor dental hygiene to an increased risk of Alzheimer's disease. Now, researchers have discovered a link between Streptococcus anginosus, a bacteria found in oral abscesses, and an increased risk of brain abscesses.

Featured Neuroscience Open Neuroscience Articles

·February 26, 2020·4 min read

Vaping alters oral bacteria, increasing infection risk

Vaping e-cigarettes modulates the oral microbiome and increases the abundance of pathobionts. The aerosols in vaping products alter the host response, prompting gum inflammation and making epithelial cells in the mouth susceptible to infection.

Featured Neuroscience

·September 3, 2019·6 min read

Mouthwash use could inhibit benefits of exercise

Results show the blood-pressure-lowering effects of exercise were diminished by more than 60% over the first hour of recovery, and completely absent two hours post-exercise in those who used antibacterial mouthwash.

Featured Neurology Open Neuroscience Articles

·October 4, 2018·6 min read

Periodontal Disease Bacteria May Kick Start Alzheimer’s

A new mouse study reveals long term exposure to bacteria associated with periodontal disease causes neuroinflammation and neurodegeneration, leading to similar effects of Alzheimer's disease. Researchers report periodontal disease may be an initiator of Alzheimer's.