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Updated: Aug 24, 2026

Collection and Extraction of Occupational Air Samples for Analysis of Fungal DNA
Published on: May 2, 2018
Pathogenesis of indoor fungal diseases
1Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555-0609, USA. michael.mcginnis@utmb.edu
Abstract:
Mold growth within homes and other buildings has been associated to varying degrees with human health problems. These problems vary from allergenic disease to toxicosis. Case definitions for mold exposure have not been adequately defined to allow for a pathognomonic diagnosis of mold-caused disease following indoor exposure. Some important factors that may contribute to the pathogenesis of indoor mold induced disease include beta (1,3)-D-glucans, outer cell wall fungal hydrophobins, 1,8-dihydroxynaphthalene melanin, fungal volatile organic compounds, mycotoxins, and stachylysin. The information in this contribution was presented as the ISHAM Presidential address as a means to clarify some of the confusing surrounding indoor mold-related health issues.
Insights
Indoor mold exposure can cause various health issues, from allergies to toxicosis. Current diagnostic criteria are insufficient, but factors like fungal compounds and mycotoxins are key to understanding mold-induced diseases.
Area of Science:
- Environmental Health
- Mycology
- Toxicology
Background:
- Indoor mold growth is linked to diverse human health problems, ranging from allergic reactions to toxic effects.
- Existing case definitions for mold exposure lack the specificity for definitive diagnosis of mold-related illnesses.
- Understanding the complex mechanisms of indoor mold-induced disease is crucial for public health.
Purpose of the Study:
- To clarify the confusing aspects of indoor mold-related health issues.
- To review key pathogenic factors contributing to mold-induced diseases.
- To provide a foundation for improved diagnostic approaches.
Main Methods:
- Review of scientific literature on indoor mold and human health.
- Analysis of proposed pathogenic factors in mold exposure.
- Synthesis of information presented at the ISHAM Presidential address.
Main Results:
- Several factors are implicated in mold pathogenesis, including beta (1,3)-D-glucans, hydrophobins, melanin, volatile organic compounds, mycotoxins, and stachylysin.
- The precise role and interaction of these components in disease development require further investigation.
- Lack of clear diagnostic criteria hinders accurate identification of mold-related illnesses.
Conclusions:
- Indoor mold exposure presents a complex health challenge with poorly defined diagnostic pathways.
- Key fungal components and toxins play significant roles in the pathogenesis of mold-induced diseases.
- Further research is needed to establish definitive diagnostic standards for indoor mold exposure.
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