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Updated: Jul 14, 2026

Collection and Extraction of Occupational Air Samples for Analysis of Fungal DNA
Published on: May 2, 2018
Toxic mold: phantom risk vs science
Jean A Chapman1, Abba I Terr, Robert L Jacobs
1University of California Medical Center, San Francisco, California, USA. jachapmn@swbellnet
Objective:
To review the available literature on the subject of fungi (molds) and their potential impact on health and to segregate information that has scientific validity from information that is yet unproved and controversial.
Data Sources:
This review represents a synthesis of the available literature in this area with the authors' collective experience with many patients presenting with complaints of mold-related illness.
Study Selection:
Pertinent scientific investigation on toxic mold issues and previously published reviews on this and related subjects that met the educational objectives were critically reviewed.
Results:
Indoor mold growth is variable, and its discovery in a building does not necessarily mean occupants have been exposed. Human response to fungal antigens may induce IgE or IgG antibodies that connote prior exposure but not necessarily a symptomatic state. Mold-related disease has been discussed in the framework of noncontroversial and controversial disorders.
Conclusions:
When mold-related symptoms occur, they are likely the result of transient irritation, allergy, or infection. Building-related illness due to mycotoxicosis has never been proved in the medical literature. Prompt remediation of water-damaged material and infrastructure repair should be the primary response to fungal contamination in buildings.
Insights
Fungal contamination in buildings can cause irritation, allergies, or infections. However, building-related illness from mycotoxicosis remains unproven, emphasizing prompt remediation of water-damaged areas.
Area of Science:
- Environmental Health
- Mycology
- Toxicology
Background:
- Fungi, commonly known as molds, are ubiquitous in indoor environments.
- Concerns exist regarding their potential health impacts, necessitating a scientific review of available data.
Purpose of the Study:
- To critically review the scientific literature on fungi (molds) and their health effects.
- To differentiate scientifically validated information from unproved and controversial claims regarding mold-related illnesses.
Main Methods:
- A comprehensive literature review synthesizing existing research on toxic mold issues.
- Inclusion of authors' clinical experience with patients reporting mold-related illnesses.
- Critical appraisal of pertinent scientific investigations and previously published reviews.
Main Results:
- Indoor mold presence does not automatically imply occupant exposure.
- Antibodies (IgE or IgG) indicate fungal exposure but not necessarily illness.
- Mold-related diseases are categorized into noncontroversial (irritation, allergy, infection) and controversial (mycotoxicosis) disorders.
Conclusions:
- Mold-related symptoms are typically transient irritation, allergy, or infection.
- No definitive proof of building-related illness due to mycotoxicosis exists in medical literature.
- Immediate remediation of water damage and infrastructure repair are the recommended primary responses to fungal contamination.
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