Better hygiene in wealthy nations may increase Alzheimer’s risk

People living in industrialised countries may be more likely to develop Alzheimer’s due to greatly reduced contact with bacteria, viruses and other microorganisms - which can lead to problems with immune development and increased risk of dementia, suggests a new study.

There are important implications for forecasting future global disease burden, especially in developing countries as they increase in sanitation
-Molly Fox

New research has found a “very significant” relationship between a nation’s wealth and hygiene and the Alzheimer’s “burden” on its population. High-income, highly industrialised countries with large urban areas and better hygiene exhibit much higher rates of Alzheimer’s.

Using ‘age-standardised’ data - which predict Alzheimer’s rates if all countries had the same population birth rate, life expectancy and age structure - the study found strong correlations between national sanitation levels and Alzheimer’s.


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Image:Wash your hands

Credit: Prempcc via Flickr


Reproduced courtesy of the University of Cambridge

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