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How a farming environment protects from atopy.

Julie Deckers1, Bart N Lambrecht2, Hamida Hammad1

  • 1Laboratory of Immunoregulation and Mucosal Immunology, VIB Center for Inflammation Research, Technologiepark-Zwijnaarde 71, B-9052 Ghent (Zwijnaarde), Belgium; Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium.

Current Opinion in Immunology
|September 10, 2019
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Summary
This summary is machine-generated.

Early-life exposure to farm environments, including livestock and unpasteurized milk, protects against allergies. Farm dust microbes and their byproducts alter immune responses in children, preventing allergy development.

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Area of Science:

  • Environmental health
  • Immunology
  • Microbiology

Background:

  • Exposure to farming environments early in life is linked to reduced allergy development.
  • Key factors include contact with livestock, hay, and consumption of unpasteurized milk.
  • Farm dust composition differs from urban dust due to microbial presence.

Purpose of the Study:

  • To investigate the mechanisms by which farm environments protect against allergies.
  • To understand the role of farm dust microbes and their metabolites in immune modulation.
  • To explore how these exposures influence immune system and barrier cell responses in children.

Main Methods:

  • Comparative analysis of farm dust and urban home dust microbial composition.
  • Identification of microbial metabolites and cell wall components in farm dust.
  • Assessment of microbial colonization at barrier sites (skin, lung, intestine) in children.
  • Evaluation of changes in immune system and barrier cell responses.

Main Results:

  • Farm dust contains specific microbes that confer protection against allergies.
  • Microbial metabolites and cell wall components from farm dust alter home dust composition.
  • These components can colonize barrier sites in children from farming environments.
  • Persistent changes in immune and barrier cell responses are observed in children exposed to farm environments.

Conclusions:

  • The protective effect of farm environments against allergies is mediated by microbial exposures.
  • Early-life microbial colonization and immune modulation are crucial for allergy prevention.
  • Understanding these mechanisms can inform strategies for allergy prevention in non-farm settings.