A study has found that people with poor oral hygiene or gum disease could be at higher risk of developing Alzheimer's compared with those who have healthy teeth, according to Medical News Today, citing a study published in the Journal of Alzheimer's Disease.

Researchers from the University of Central Lancashire (UCLan) in the UK discovered the presence of a bacterium called Porphyromonas gingivalis in the brains of patients who had dementiawhen they were alive. The bug is usually associated with chronic periodontal (gum) disease.

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