This aspergillus fumigatus is a microorganism and one of the most common conidia-type fungi that are airborne. This fungus may grow indoors and outdoors and is widely distributed in the environment. The majority of people probably regularly breathe in aspergillus spores. Strong immune systems often prevent negative repercussions for their owners. In contrast, those with compromised immune systems could have life-threatening illnesses. Although allergies to this type of mold are uncommon, some people especially those with respiratory conditions or asthma, may develop a severe allergic reaction upon coming into contact with aspergillus spores. This test detects IgE antibody in blood.