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Related Experiment Videos

Occupational asthma caused by champignon flies.

M Cimarra1, C Martínez-Cócera, M Chamorro

  • 1Department of Allergy, Hospital Clínico San Carlos, Madrid, Spain.

Allergy
|June 25, 1999
PubMed
Summary

Occupational asthma in mushroom workers is rare. This study identified fly proteins from Phoridae and Sciaridae families as the cause of asthma and rhinoconjunctivitis in a champignon cultivator.

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Area of Science:

  • Allergy and Immunology
  • Occupational Health
  • Environmental Health

Background:

  • Occupational bronchial asthma in mushroom workers is infrequently reported.
  • This case study investigates a 52-year-old champignon cultivator experiencing asthma and rhinoconjunctivitis.
  • The investigation focused on identifying potential insect-related antigens in the cultivation environment.

Observation:

  • The patient experienced symptoms exclusively within the mushroom culture caves.
  • Insects collected from the growing sites were identified as belonging to the order Diptera, primarily the Phoridae family (98%) and secondarily the Sciaridae family (2%).

Findings:

  • Immunoglobulin E (IgE)-mediated hypersensitivity to these specific fly proteins was confirmed through various immunological tests, including skin prick tests, conjunctival provocation tests, and serum-specific IgE analysis.

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  • Peak Expiratory Flow Rate (PEFR) monitoring revealed a direct correlation between workplace exposure and the onset of respiratory symptoms or a decline in lung function.

    • Implications:

    • This study highlights the potential for insect-derived allergens, specifically from flies common in mushroom cultivation environments, to induce occupational asthma and allergic rhinoconjunctivitis.
    • It underscores the importance of identifying and controlling insect populations in occupational settings to prevent work-related respiratory diseases.