As are most aspergilli, A. versicolor is extremely widespread in nature. However, this species tends to occupy the coldest regions of Aspergillus distributions, as well as deserts, peat bogs, estuarine sediments, compost, linoleum, chipboard, paintings, cheeses, spices, stored grains, house dust, mattress dust and rotting military equipment in the tropics. This species is extremely xerophilic and common in indoor environments, where its growth can cause moldy odors. A. versicolor is known to produce a carcinogenic compound known as sterigmatocystin. A. versicolor is allergenic, and mycoses of this species include osteomyelitis and infections of the auditory canal, fingernails and toenails.
Water Activity (min.):
Cyclopiazonic acid and Sterigmatocystin