Other species of Aspergillus are known to produce mycotoxins. Also known to be allergenic. In the natural environment it is found on leaf surfaces, indoors it is common where moisture accumulates such as kitchens and bathrooms. Common in the outdoor environment and introduced indoors with outdoor air. Indoor sources of basidiospores are from dry rot.
Many basidiospores are allergenic.
Readily colonizes cellulose-based materials and is commonly found on sheet rock and other indoor substrates. Allergenicity is not known. Some species produce mycotoxins but these have not been well studied. Spores of Cladosporium are the most abundant outdoor spore type and have a worldwide distribution. The fungus normally exists as a saprophyte or weak plant pathogen, but a few species of Cladosporium have been reported as human pathogens.