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February 18 2013

Tooth decay bacteria evolved as diet changed


Mesolithic hunter-gatherers living on a meat-dominated, grain-free diet had much healthier mouths that we have today, with almost no cavities and gum disease-associated bacteria, a genetic study of ancient dental plaque has revealed.

The international team of researchers, led by a group at the Australian Centre for Ancient DNA, University of Adelaide, publish their findings in today's Nature Genetics.

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