: Aspergillus niger Specific IgE Antibody, Serum

: What This Test Measures

: The test detects and measures the amount of allergen-specific IgE antibody your immune system produces against proteins from Aspergillus niger, a common environmental mold. IgE is the antibody class most closely linked to immediate allergic reactions. When your body has been exposed and sensitized to this mold, specific IgE antibodies appear in the blood and can be measured.

: Why Your Provider May Order It

: This test is typically ordered when a mold allergy or mold-related respiratory problem is suspected. Your provider may recommend it if you have persistent nasal congestion, sneezing, itchy or watery eyes, wheezing, coughing, or asthma-like symptoms that could be triggered by mold exposure, or if other allergy testing is being evaluated.

: How the Sample Is Collected

: A small blood sample is drawn from a vein, usually in your arm, at a clinic or laboratory. No special preparation such as fasting is generally required, though you should follow any specific instructions your ordering provider gives you. The serum is then separated and analyzed.

: What Results Can Mean

: Results are usually reported as a level or class of specific IgE. A detectable or elevated result suggests sensitization to Aspergillus niger, while an undetectable result makes allergy to this mold less likely. Sensitization does not always mean you will have symptoms, so results are interpreted together with your clinical history and other findings.