The genusStachybotrysbelongs to filamentous fungi found in indoor environment, mostly
on cellulose-rich substrates after water-damage. The major purpose of this study was
to investigate the influence of different building materials in case of mold infestation
on the mycotoxin production ofStachybotrysspecies. FifteenStachybotrysmycotoxins including
satratoxins, phenylspirodrimanes, and recently discovered stachybotrychromenes were
in the focus of the investigations. Artificial and natural infestations were compared
to determine whether environmental factors, for example, time of growth, temperature,
humidity, and material additives have an influence on the observed mycotoxin profiles.
It turned out that mycotoxin profiles fromStachybotrysspp. on building materials can
be influenced by cellulose, paints, and paste of the materials. The total toxin levels
of artificially and naturally contaminated gypsum board samples ranged up to 30 mu
g/cm(2), whereas wallpaper samples showed total toxin levels in the range of 20-66
mu g/cm(2). A naturally infested sample disclosed the conversion of the dialdehyde
components to the corresponding lactone isomers under the influence of light.