The populations of microbes living in our mouth have changed since the medieval era. Credit: Liam Lanigan
Medieval teeth reveal how oral bacteria changed - latest science news daily

A new study analyzed medieval human remains from Denmark to uncover how bacteria living in the human mouth changed over time.

The dental plaque found on the teeth suggest that oral microbiomes from those times were very different compared to modern times. Most likely this is due to the changes in our lifestyles. Present diets include much more variety than medieval diets. Moreover, today we have antibiotics which, together with other environmental factors, have an impact on out microbes.

Interestingly, many species of bacteria identified in the medieval samples are associated with higher risk of tooth and gum disease, suggesting, as expected, that the health status was not great in the past.

Read the full story: ArsTechnica
Scientific publication: Nature Communications