Overview: Immunoglobulin D and E Typing TestIntroduction: The Immunoglobulin D and E Typing Test types IgD and IgE to diagnose immune disorders or allergies, causing infections or allergic reactions. Following 2023 AAAAI guidelines, it uses immunoassays for high specificity, supporting immune and allergy screening. This test is critical for guiding diagnosis, treatment planning, and improving outcomes in immunology for patients with suspected immune or allergic conditions.
Other Names: IgD & IgE Assay, Immunoglobulin Typing Test.
FDA Status: Laboratory-developed test (LDT), meeting immunology standards for diagnostic accuracy.
Historical Milestone: IgD and IgE testing began in the 1970s with immune and allergy research. Immunoassay-based methods improved in the 1990s, enhancing diagnostic precision.
Purpose: Types IgD and IgE to diagnose immune disorders or allergies, guides treatment, and evaluates patients with infections or allergic reactions.
Test Parameters: 1. IgD & IgE Typing
Pretest Condition: No fasting required. Collect serum or saliva at any time. Report history of infections, allergies, or immune disorders.
Specimen: 2-5 mL serum (SST) or 1-2 mL saliva (sterile container). Transport in a biohazard bag.
Sample Stability at Room Temperature: 8 hours
Sample Stability at Refrigeration: 7 days
Sample Stability at Frozen: 6 months
Medical History: Document infections, allergic reactions (e.g., asthma, eczema), or immune disorders. Include current medications, especially antihistamines or immunoglobulins.
Consent: Written consent required, detailing the tests purpose, immune or allergy implications, and potential need for treatment planning.
Procedural Considerations: Uses immunoassays to type IgD and IgE levels. Results are available in 3-5 days, supporting clinical decisions. Performed in laboratories, often for immune or allergy assessment.
Factors Affecting Result Accuracy: Improper sample handling or contamination can affect results. Recent allergen exposure or infections may influence levels.
Clinical Significance: Abnormal IgD or IgE levels suggest immune disorders or allergies, guiding immunotherapy or allergen avoidance. Normal levels may require further testing.
Specialist Consultation: Consult an immunologist or allergist for result interpretation and treatment planning.
Additional Supporting Tests: Total IgE, allergen-specific IgE, or lymphocyte subset analysis to assess immune or allergic conditions.
Test Limitations: Not specific to one condition; clinical correlation is needed. IgE levels vary with allergen exposure.
References: AAAAI Allergy Guidelines, 2023; Journal of Allergy and Clinical Immunology, Galli SJ, 2022.
