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  1. Home
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  3. Greening of daycare centers and microbiota: flower power!
Our marvelous microbiota

Greening of daycare centers and microbiota: flower power!

Immunity
The gut microbiota The skin microbiota The ENT microbiota

Reinforced concrete leads to a weakened microbiota. This is the paradox of urban spaces: the nature deficit has caused a surge of autoimmune diseases among our children. Researchers have proposed greening schoolyards to rebalance the microbiota. Not only does it work, but the benefits are long-lasting.

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About this article

Created 15 March 2022
Updated 01 April 2025

Our increasingly urban lifestyles mean that our children have less and less contact with nature in their day-to-day surroundings. This has consequences for the microbiota, with the microbiota of children living in rural areas differing from that of children in urban areas. This could partly explain the higher incidence of autoimmune diseases in city children.

In 2020, a Finnish team showed the positive impact on children’s microbiota over a period of 28 days of increasing biodiversity in daycare centers.

In 2021, the same team unveiled new results. They studied 61 children in six different centers and looked at the effects on their microbiota over two years.

Microbiota: nature always wins

This study of the microbial composition of floor surfaces in daycare centers and of children’s gut, salivary, and skin flora showed that greening these spaces had a positive impact on microbial composition. The children’s gut, oral, and skin microbiota saw long-term shifts towards a new equilibrium involving increases in the relative abundance of beneficial bacteria.

Their microbiota also contained fewer potentially pathogenic microorganisms. 

This is important, since we know that a balanced microbiota contributes to the proper functioning of the immune system.

02.03.2021 Asthma: breathing in some fresh air on the farm! Read more
Actu GP : Les espaces verts urbains, bons pour nos microbiotes ? 22.12.2020 Are urban green spaces good for our microbiota? Read more

When biodiversity rhymes with immunity 

These effects observed after two years are very promising and potentially form the basis of a strategy for optimizing urban spaces. Reintroducing biodiversity into urban environments could help reduce the quantity of pathogenic microorganisms in cities, which may in turn lower the incidence of diseases linked to microbiota imbalances. However, further studies are needed to confirm any real impact on the incidence of immune-related diseases. In the meantime, feel free to let your children roll around in the grass!

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Sources

Roslund MI, Puhakka R, Grönroos M, et al.; ADELE research group. Biodiversity intervention enhances immune regulation and health-associated commensal microbiota among daycare children. Sci Adv. 2020 Oct 14;6(42):eaba2578.

Roslund MI, Puhakka R, Nurminen N, et al.; ADELE research group. Long-term biodiversity intervention shapes health-associated commensal microbiota among urban day-care children. Environment International. 2021 Aug; Dec;157:106811.

Tags
Immunity Biodiversity Nature Microbiome Flora

    See also

    Actu GP : Plus de nature pour un microbiote béton ? More nature to strengthen the microbiota?
    Dust microbiota from the city or the countryside? Atopic dermatitis has a preference!
    Created 15 March 2022
    Updated 01 April 2025

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