An **Aspergillosis IgG Antibodies Test** is a specialized serological blood assay used to detect specific immunoglobulin G (IgG) antibodies produced in response to *Aspergillus*, a common environmental fungus. Elevated levels of Aspergillosis IgG indicate an active or recent fungal infection, making this test essential for diagnosing non-invasive or chronic pulmonary forms of the disease, such as Chronic Pulmonary Aspergillosis (CPA) or an Aspergilloma ("fungus ball").
By evaluating the patient's immune response to fungal antigens, this test helps clinicians confirm persistent infections, assess treatment effectiveness, and prevent severe, long-term lung tissue damage.