Carya illinoinensis tree Ab.IgG4

This test measures IgG4 antibodies against pecan or hickory tree pollen. IgG4 antibodies develop with prolonged or repeated allergen exposure and may indicate tolerance or desensitization, particularly after allergy immunotherapy. Elevated IgG4 (compared to IgE) can suggest successful allergy treatment. This test is used to assess the effectiveness of allergy immunotherapy and monitor immune tolerance development to tree pollens. It's more specific than IgE for evaluating long-term immune responses.