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Updated: Jul 6, 2026

Murine Model of Allergen Induced Asthma
Published on: May 14, 2012
Importance of mold allergy in asthma
Jay M Portnoy1, Charles S Barnes, Kevin Kennedy
1Section of Allergy, Asthma, and Immunology, Children's Mercy Hospitals and Clinics, 2401 Gillham Road, Kansas City, MO 64108, USA. jportnoy@cmh.edu
Abstract:
Fungal exposure is hypothesized (controversially) to contribute to asthma development and to trigger symptoms in patients with asthma. The ubiquity of environmental fungal exposure makes a careful review of evidence essential. Evidence that exposure to high concentrations of fungal spores, antigens, or metabolites is associated with asthma development is limited. However, because mechanisms of asthma genesis are poorly understood, so too are the mechanisms of this potential association. This association is not proof of causality. Stronger evidence supports the hypothesis that fungal exposure triggers symptoms in asthmatic individuals. Proposed mechanisms have been tested and correlations between exposure and symptoms demonstrated. Though some correlations remain speculative, controlled studies could test such hypotheses. Because asthma is common and fungal exposure is ubiquitous, it is surprising that asthmatics don't have more symptoms when exposed to fungi. Fortunately, symptoms are dose dependent, creating an opportunity to develop clinically effective interventions. Given the right guidance, even patients with severe asthma can create healthy indoor environments.
Insights
Fungal exposure
Area of Science:
- Environmental science
- Allergy and immunology
- Respiratory medicine
Background:
- Fungal exposure is controversially linked to asthma development and symptom exacerbation.
- Ubiquitous environmental fungi necessitate a thorough review of the evidence.
- Limited evidence currently supports a causal link between fungal exposure and asthma development.
Purpose of the Study:
- To critically review the scientific evidence on the association between fungal exposure and asthma.
- To explore potential mechanisms linking fungi to asthma development and symptom triggers.
- To assess the strength of evidence for fungal exposure as a cause or trigger of asthma.
Main Methods:
- Systematic review of existing epidemiological and clinical studies.
- Analysis of proposed biological mechanisms for fungal-asthma interactions.
- Evaluation of the correlation between fungal exposure levels and asthma symptoms.
Main Results:
- Limited evidence supports fungi causing asthma development; mechanisms remain unclear.
- Stronger evidence indicates fungal exposure triggers symptoms in individuals with asthma.
- Demonstrated correlations between exposure and symptoms, though some remain speculative.
- Asthma symptom severity is dose-dependent on fungal exposure.
Conclusions:
- While fungal exposure's role in asthma development is not definitively proven, it is a significant trigger for asthma symptoms.
- Understanding dose-dependent responses offers potential for targeted interventions.
- Guidance on creating healthy indoor environments can help manage asthma in relation to fungal exposure.
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