Immunoglobulin G (IgG) details
What Immunoglobulin G (IgG) shows
Immunoglobulin G (IgG) is your body's most abundant antibody class and the main one responsible for long-term immune memory — once you've been exposed to a particular infection or vaccinated against one, IgG antibodies specific to that pathogen typically persist for years, providing lasting protection. A total IgG test measures your overall IgG level rather than reactivity to anything specific, and low total IgG can point toward an immune deficiency affecting your ability to maintain long-term immunity, increasing susceptibility to recurrent infections.
Tests that include Immunoglobulin G (IgG)
Immunoglobulin G (IgG Total) is the most abundant antibody in the blood that provides long-term immunity by recognizing and neutralizing pathogens. Measuring total IgG helps evaluate immune status and detect immune deficiencies or chronic infections.
- Immunoglobulin G (IgG) Your most abundant antibody class, providing long-term immune memory against past infections. Low levels can point to an immune deficiency.
Immunoglobulin G (IgG Total) is the most abundant antibody in the blood that provides long-term immunity by recognizing and neutralizing pathogens. Measuring total IgG helps evaluate immune status and detect immune deficiencies or chronic infections.
- Immunoglobulin G (IgG) Your most abundant antibody class, providing long-term immune memory against past infections. Low levels can point to an immune deficiency.
Measurement of IgG subclasses may be helpful in the management and understanding of immunodeficiency diseases, hypersensitivity states, and conditions involving susceptibility to infection.
- Immunoglobulin G (IgG) Your most abundant antibody class, providing long-term immune memory against past infections. Low levels can point to an immune deficiency.
- Immunoglobulin G Subclass 1 Measures IgG1, the most abundant of the four IgG antibody subclasses, to help evaluate immune function in people with frequent or unusual infections.
- Immunoglobulin G Subclass 2 Measures IgG2, the IgG antibody subclass important for fighting bacteria with sugar coatings, to help evaluate immune function in people with recurrent infections.
- Immunoglobulin G Subclass 3 Measures IgG3, an IgG antibody subclass that is especially active against viruses and in activating the immune system, to help evaluate recurrent infections.
- Immunoglobulin G Subclass 4 A subclass of IgG antibodies. Elevated levels are associated with IgG4-related disease, a rare inflammatory condition that can affect multiple organs.
This test measures total IgG, IgA, and IgM. Elevated IgG, IgA, and/or IgM levels are seen in hypergammaglobulinemia, chronic inflammatory conditions, and lymphoproliferative diseases. Decreased levels are associated with hypogammaglobulinemia and immunodeficiency states.
- Immunoglobulin A (IgA) One of your main antibody classes, concentrated in mucous membranes (gut, respiratory tract). Low levels are linked to recurrent infections; also checked before certain other antibody tests, like celiac panels.
- Immunoglobulin G (IgG) Your most abundant antibody class, providing long-term immune memory against past infections. Low levels can point to an immune deficiency.
- Immunoglobulin M (IgM) The antibody class your body produces first in response to a new infection. Elevated levels often indicate a recent or acute infection.
This test measures total IgG, IgA, and IgM. Elevated IgG, IgA, and/or IgM levels are seen in hypergammaglobulinemia, chronic inflammatory conditions, and lymphoproliferative diseases. Decreased levels are associated with hypogammaglobulinemia and immunodeficiency states.
- Immunoglobulin A (IgA) One of your main antibody classes, concentrated in mucous membranes (gut, respiratory tract). Low levels are linked to recurrent infections; also checked before certain other antibody tests, like celiac panels.
- Immunoglobulin G (IgG) Your most abundant antibody class, providing long-term immune memory against past infections. Low levels can point to an immune deficiency.
- Immunoglobulin M (IgM) The antibody class your body produces first in response to a new infection. Elevated levels often indicate a recent or acute infection.
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