Causes of Aspergillosis
In most cases, aspergillosis is caused by a type of mold called Aspergillus fumigatus. Aspergillus mold can often be found on dead leaves, compost piles and other decaying vegetable matter, stored grain, and even foods and spices. The mold spores may be carried indoors on shoes and clothing and can grow on carpeting. Window unit air conditioners are susceptible to mold growth if filters are not kept clean, and water does not drain properly from the unit. Sites where buildings are being torn down or renovated may be contaminated with mold spores.