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Related Experiment Video

Updated: Feb 7, 2026

In Vivo Assessment of Alveolar Macrophage Efferocytosis Following Ozone Exposure
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An acute exposure to ozone impairs human olfactory functioning.

Axel Muttray1, Jan Gosepath2, Florian Schmall3

  • 1Institute of Occupational, Social and Environmental Medicine, University Medical Center of the Johannes Gutenberg University Mainz, Langenbeckstraße 1, D-55131 Mainz, Germany.

Environmental Research
|July 16, 2018
PubMed
Summary
This summary is machine-generated.

Acute exposure to 0.2 ppm ozone impairs olfactory function, affecting smell perception. This study demonstrates a clear decline in olfactory functioning after short-term ozone exposure in healthy individuals.

Keywords:
ExposureHumanNasal mucosaOlfactory thresholdOzone

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Area of Science:

  • Environmental Health
  • Sensory Science
  • Toxicology

Background:

  • Ozone is a common air pollutant known to be an irritant.
  • The impact of acute ozone exposure on olfactory function requires further investigation.

Purpose of the Study:

  • To determine if acute exposure to 0.2 parts per million (ppm) ozone impairs olfactory functioning.
  • To assess the irritating effects and inflammatory markers in nasal secretions.

Main Methods:

  • Healthy subjects were exposed to either 0.2 ppm ozone or sham conditions for two hours.
  • Olfactory thresholds were measured using the Sniffin' Sticks test before and after exposure.
  • Nasal secretions were analyzed for interleukin levels.

Main Results:

  • Ozone exposure led to significantly higher olfactory detection thresholds, indicating impaired smell.
  • No significant irritating effects on the upper airways were reported, though coughing increased.
  • Interleukin concentrations in nasal secretions did not elevate post-exposure.

Conclusions:

  • Acute exposure to 0.2 ppm ozone clearly impairs olfactory functioning.
  • Ozone's effect on smell perception warrants attention in environmental health contexts.