Mycotoxins as harmful indoor air contaminants

Area of Science:

• Environmental Science
• Toxicology
• Mycology

Background:

• Fungal metabolites (mycotoxins) are known health hazards in contaminated food and feed.
• Emerging concerns exist regarding mycotoxin-producing fungi in indoor environments like damp buildings.
• Key food/feed mycotoxins are uncommon indoors, but related compounds from indoor molds present health challenges.

Purpose of the Study:

• To differentiate mycotoxins found in food/feed versus indoor environments.
• To discuss the health effects of mycotoxins produced by common indoor fungi (e.g., Penicillium, Aspergillus, Stachybotrys, Chaetomium).
• To highlight the need for specific biomarkers and chronic exposure studies for indoor mycotoxins.

Main Methods:

• Comparative analysis of mycotoxin profiles in food/feed versus indoor environments.
• Review of toxicological data for mycotoxins produced by indoor fungal species.
• Identification of knowledge gaps regarding health effects and exposure assessment.

Main Results:

• Indoor environments harbor different fungal species and mycotoxins compared to food/feed.
• Common indoor molds like Penicillium and Aspergillus produce distinct mycotoxins.
• Less common indoor fungi such as Stachybotrys and Chaetomium also produce relevant mycotoxins.

Conclusions:

• Assessing health risks from indoor mycotoxins requires understanding species-specific toxins.
• Development of relevant biomarkers is crucial for monitoring indoor mycotoxin exposure.
• Long-term chronic exposure studies are needed to fully understand the health impacts of indoor mycotoxins.