IgD test is done to detect the presence of immunoglobulin D antibody.
What is IgD?
IgD test is a lab test which is done to measure the amount of immunoglobulin D antibody in the bloodstream. Immunoglobulin D is a part of a set of proteins in the body that protect the body against various kinds of antigens. The other immunoglobulin antibodies are IgM, IgG, IgA, and IgE. 
Why is IgD suggested
The Immunoglobulin D test is suggested under the following circumstances:-
- When exposure to an infectious or foreign agent is speculated.
- For the evaluation of immunity against specific conditions.
- For the diagnosis of an autoimmune condition.
- For the diagnosis for the reason of a transfusion reaction or rejection of a transplanted organ.
- For the diagnosis of an allergy
- For monitoring the course of an infection or autoimmune process.
How is IgD performed?
IgD test is performed as follows:
- A blood sample is taken from the patient.
- The lab test is done on the test sample.
What are the parameters measured in IgD
IgD test gives the practitioner an idea about the levels of the antibody present in the bloodstream. Low levels of the antibody can lead to autoimmune conditions. Low levels also indicate lower immunity and a higher propensity of getting affected by the presence of specific antigens.
Preparation before performing IgD
The following points need to be taken into consideration before the IgD test:-
- The patient must visit the doctor to discuss all the details of symptoms and medical history.
- If the patient has experienced any prior problems in taking blood tests, they must inform the doctor before taking the test.
Post-care after IgD
IgD test is a simple procedure. No special care is required post the sample for testing has been given.
A bandage may be required in case blood is drawn.
Sample types in IgD
IgD test is done only with the use of a blood sample.
Side effects/risks of IgD
IgD is a simple lab test hence, there are no side effects or risks of undergoing the test.