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Thinking of building or renovating a home?  Know This!

Building Or Renovating?
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INDOOR MOLD AND MYCOTOXIN PRODUCTION IS COMMON.
Many molds are able to grow and produce mycotoxins on wet or slightly damp building materials such as wood, fiberboard, drywall, carpets, furniture, paper, wallpaper, glass wool, and other materials.  Especially common indoor molds include Fusarium, Cladosporium, Alternaria, Aspergillus, Penicillium, Stachybotrys and various yeasts.   Stachybotrys and Memnoniella are molds which produce relatively high amounts of mycotoxins when growing on wet material.

A WIDE VARIETY OF MOLDS AND MYCOTOXINS IN BUILDING MATERIALS.

A German study tested 51 indoor building samples for mold and mycotoxin growth.  These sample grew a fairly wide variety of fungi from the Penicillium, Aspergillus, Scopulaiopsis, Paecilomyces, Chaetonium, Stachybotrys, Acremonium, Fusarium, and Phoma species (Lindemann et al. 2022).  Twenty eight of the 51 (54%) samples contained significant amounts of mycotoxins.  Significant amounts of the following mycotoxin classes were collected including: sterigomatocystin in 23 samples, phenyl spirodramines in 8 samples, enniatins in 5 samples, and assorted stachytoxins in 2 samples.

FUNGI CAN REMAIN DORMANT AND VIABLE FOR MANY YEARS UNDER DRY CONDITIONS.

While most fungi only grow under wet conditions, many fungal spores can remain dormant for years and resume growth when wet again.  Studies have indicated that many common toxic indoor fungi such as Stachybotrys, Chaetonium, and Penicillium can remain dormant in dry drywall for 3 years and resume growth once water is added. (Wilson, 2004 #40366)

References

1. Lindemann V, Schleiner T, Maier U, Fels H, Cramer B, Humpf HU (2022): Analysis of mold and mycotoxins in naturally infested indoor building materials. Mycotoxin research

2. Stephen Wilson et al.  Culture and Toxicity of Sick Building Syndrome- Related Fungi Over Time- Journal of Occupational and Environmental Hygiene 2004 1:8:500-4.

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