Summary
This study, published in the New England Journal of Medicine, compared the microbiomes and immune profiles of children from Amish communities (practising traditional single-family subsistence farming) with those from Hutterite communities (using industrialised, communal farming). Amish children showed markedly lower rates of asthma and allergic sensitisation, which the authors attribute in part to greater and more diverse microbial exposure associated with traditional farm environments. Mouse model experiments described in the paper further supported a causal role for environmental microbial exposure in modulating innate immune responses and asthma susceptibility.
UK applicability
Although conducted in US agrarian communities, the findings are highly relevant to UK research on the 'farm effect' and hygiene hypothesis, informing debates around biodiversity, farming practices, and childhood allergy and asthma policy in rural and agricultural contexts.
Key measures
Gut and airway microbiome composition (16S rRNA sequencing); asthma prevalence (%); allergic sensitisation rates; innate immune cell profiles; endotoxin levels in household dust
Outcomes reported
The study compared gut and airway microbiome compositions between Amish and Hutterite children, and measured rates of asthma and allergic sensitisation alongside immune response markers. It assessed whether differences in microbial exposure linked to traditional versus industrialised farming practices correlated with differential asthma prevalence.
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