A naturally prevalent fungus that is most frequently associated with grasses, plant material, decaying food, and soil. It is common to both indoor and outdoor environments. Various species of this fungus can produce the mycotoxins, sterigmatocystin, which has been shown to produce liver and kidney damage when ingested by laboratory animals. 

/Drechslera includes two genera that produce spores with a similar morphology. These spores are abundant in the outdoor environment. Occasionally, they can also grow indoors on a variety of materials [..]