What is quantitative immunoglobulins lab test?

Quantitative serum immunoglobulin tests are used to detect abnormal levels of the three major classes (IgG, IgA and IgM). Testing is used to help diagnose various conditions and diseases that affect the levels of one or more of these immunoglobulin classes.

Where can immunoglobulin be found?

Immunoglobulin A (IgA): It’s found in the linings of the respiratory tract and digestive system, as well as in saliva (spit), tears, and breast milk. Immunoglobulin G (IgG): This is the most common antibody. It’s in blood and other body fluids, and protects against bacterial and viral infections.

What is a QN blood test?

Quantitative nephelometry is a lab test to quickly and accurately measure levels of certain proteins called immunoglobulins in the blood. Immunoglobulins are antibodies that help fight infection. This test specifically measures the immunoglobulins IgM, IgG, and IgA.

Can immunoglobulins be measured in the laboratory?

Most laboratories use IFE after screening samples with the SPEP test and/or quantitative immunoglobulin measurements. Although serum is the most common sample source, urine or cerebrospinal fluid can also be examined to detect and/or characterize M-proteins or their fragments.

What is the normal range of quantitative immunoglobulins?

Normal results for the three immunoglobulins are: IgG: 650 to 1600 milligrams per deciliter (mg/dL), or 6.5 to 16.0 grams per liter (g/L) IgM: 54 to 300 mg/dL, or 540 to 3000 mg/L. IgA: 40 to 350 mg/dL, or 400 to 3500 mg/L.

Is High IgA serious?

High IgA usually points to chronic infections or inflammation, though diverse disorders can raise its levels. In adults, values above 300 mg/dL are considered high by most labs. High levels do not cause any symptoms. Symptoms depend on the underlying cause and health status, which should be evaluated by a physician.

What happens if immunoglobulin is high?

If your immunoglobulin levels are too high, it may be a sign of an autoimmune disease, a chronic illness, an infection, or a type of cancer.

What is a immunoglobulins blood test used for?

An immunoglobulins test is done to measure the level of immunoglobulins, also known as antibodies, in your blood. Antibodies are substances made by the body’s immune system in response to bacteria, viruses, fungus, animal dander, or cancer cells.

What is normal IgG range?

Reference range/units Normal Ranges Adult: IgG 6.0 – 16.0g/L. IgA 0.8 – 3.0g/L. IgM 0.4 – 2.5g/L.

What is a normal IgA level in adults?

The manufacturer indicates the following reference intervals for healthy adults: IgA 70–400 mg/dl, IgG 700–1600 mg/dl and IgM 40–230 mg/dl [35].