Cystitis or tooth decay could trigger dementia just a few years later

image via New Scientist

March 24, 2026, 6:00 PM

• •Hospitalization for severe infections is associated with a higher risk of dementia.
• •Cystitis, pneumonia, and tooth decay are among the infections linked to increased risk.
• •Early-onset dementia is also associated with multiple infections, including gastroenteritis and colitis.
• •Inflammation related to infections may play a role in the development of dementia.
• •Prevention and prompt treatment of infections may help reduce dementia risk.

Recent research suggests a link between severe infections and an increased risk of developing dementia. A study analyzing health records found that individuals hospitalized for infections like cystitis, pneumonia, or tooth decay were more likely to be diagnosed with dementia within six years. The study highlights the potential for infection avoidance and management to reduce the risk of dementia. Further research is needed to determine the causal relationship and explore preventative interventions.

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