Immunoglobulin G, (IgG) Quantitative, Serum
Fasting Required: No

Specimen: Blood

Lab: Quest Diagnostics

Results: 2-3 business days
Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

Description: About 70-80% of the immunoglobulin in the blood is IgG. IgG antibodies form the basis of long-term protection against microorganisms. Specific IgG antibodies are produced during an initial infection or exposure, rising a few weeks after it begins, then decreasing and stabilizing. The body retains a catalog of IgG antibodies that can be rapidly reproduced whenever exposed to the same antigen. In those with a normal immune system, sufficient IgG is produced to prevent re-infection.

Alternative Name(s): Immunoglobulin G