Immunoglobulin G (IgG), Blood


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Quest Diagnostics Test Code: 543

This test measures the amount of IgM in the blood and is used to determine current and active disease.

Immunoglobulins are special proteins that the body makes in order to fight foreign particles and infections. All antibodies are immunoglobulins. There are different types of immunoglobulins. Immunoglobulin G (IgG) is a widespread immunoglobulin and provides long-term protection. IgG is produced in response to bacterial, viral and parasitic infections in order to provide the host with immunity. The levels of IgG in the blood are measures for specific antigens, as they determine immunity to a specific pathogen.

This test is performed in following conditions such as:

• To determine disease and immunity status to a host of bacterial, viral and parasitic infections.


Specimen Collected
  • Blood
Estimated Time Taken

Turnaround for this test is typically 1-3 business days.