394. The Dirt (Hygiene) Hypothesis, Allergies and Autoimmune Disease


This Biology Factsheet:

  • Explains the dirt (hygiene) hypothesis.
  • Defines and gives examples of allergies and autoimmune diseases.
  • Outlines the nature and useful functions of the microorganisms (gut biota) that inhabit our gastro-intestinal tract.
  • Outlines the autoimmune diseases that may result from disturbance to these gut biota.
  • Explains why scientists disagree about the name of the hypothesis.
  • Reviews past exam questions on these topics.
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.PDF (pdf) 319.227 KB

Publication Date

January 2021


ISSN: 1351-5136

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394 The Dirt and Hygiene Hypothesis

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