Equipment used Supplies for drawing blood. An enzyme-linked marker is added, which causes a color change if your serum contains antibodies to the antigen tested. After the test After the Test Follow procedures for venous blood drawing. Results available when 7-14 days. The test demonstrates the amount of IgA, IgG, and IgM antibodies in a milliliter of serum.
Interpretation varies with the reason for the test.
Since treatment of insect allergies leads to production of IgG, a high level can mean that the treatment is successful. Similarly, since IgG is produced in response to an aspergillosis infection, a high level indicates a recent infection. Advantages It's relatively inexpensive. No radioactive materials are involved. It does not detect IgE, the antibody most commonly involved in allergic reactions.