Test Details: Allergic bronchopulmonary aspergillosis (ABPA) is a complex hypersensitivity reaction in response to colonization of the airways with Aspergillus fumigatus. It affects uncontrolled asthmatics, cystic fibrosis patients, and immunocompromised patients. Early diagnosis and rapid implementation of proper management are critical to prevent complications and/or disease progression. This test measures the amount of allergen in the blood in order to detect an allergy to Aspergillus fumigatus.