The mold conundrum in chronic rhinosinusitis: where do we stand today?
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Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber
Published on: March 3, 2023
Fenna A Ebbens1, Wytske J Fokkens
1Department of Otorhinolaryngology, Head and Neck Surgery, Academic Medical Center, Amsterdam, The Netherlands. f.a.ebbens@amc.uva.nl
Abstract:
Chronic rhinosinusitis (CRS) is an inflammatory disorder affecting the nose and paranasal sinuses. Although bacteria have long been implicated as pathogens in most forms of CRS, fungi may be responsible for some forms. Several recent studies demonstrated that, under optimal conditions, fungi can be identified in the nose and paranasal sinuses of nearly every individual (including all CRS patients). An aberrant immune response to these ubiquitous fungi has been suggested to explain the development of CRS in some individuals. Several mechanisms requiring additional research, including adequate controls, have been proposed and are reviewed in this article. Although preliminary trials suggested that CRS signs and symptoms improve upon treatment with topical and oral antifungal agents, several double-blind, placebo-controlled trials demonstrated the contrary. In the absence of convincing immunologic data and evidence of clinical improvement upon therapy with antifungal agents, the case against fungi remains unproven.
Insights
Fungi are commonly found in the nose and sinuses, but evidence does not support their role in chronic rhinosinusitis (CRS). Antifungal treatments have not shown clinical improvement for CRS patients.
Area of Science:
- Immunology
- Otolaryngology
- Microbiology
Background:
- Chronic rhinosinusitis (CRS) is a nasal and sinus inflammatory condition.
- Bacteria are traditionally considered primary pathogens, but fungal involvement is debated.
- Fungi are ubiquitous in the nasal passages and sinuses of both healthy individuals and CRS patients.
Purpose of the Study:
- To review the proposed mechanisms linking fungal presence to CRS development.
- To evaluate the evidence for fungal involvement in CRS pathogenesis.
- To assess the efficacy of antifungal therapies in managing CRS.
Main Methods:
- Review of recent studies on fungal identification in CRS.
- Analysis of proposed immunological mechanisms.
- Evaluation of clinical trial data for antifungal treatments.
Main Results:
- Fungi are detected in nearly all individuals, including CRS patients, under optimal conditions.
- Preliminary trials suggested benefits from antifungal agents, but rigorous placebo-controlled studies did not confirm these findings.
- Lack of convincing immunologic data and clinical evidence of improvement with antifungal therapy.
Conclusions:
- The role of fungi as a causative agent in chronic rhinosinusitis remains unproven.
- Further research with adequate controls is needed to elucidate potential fungal involvement.
- Current evidence does not support the use of antifungal agents for treating CRS.
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