Immunoglobulin G (IgG)
The purpose of this test is to:
- Measure IgG levels in the blood
- Assess long-term immune response
- Detect immune deficiencies or chronic infections
- Support diagnosis of autoimmune and inflammatory conditions
IMMUNOGLOBULIN G (IGG) Test
The Immunoglobulin G (IgG) test measures the level of Immunoglobulin G, the most abundant type of antibody in the blood. IgG plays an important role in the body's long-term immune defense by helping recognize and fight bacteria, viruses, and other foreign substances.
IgG antibodies are produced after exposure to infections and can provide longer-lasting immune protection. Measuring total IgG can therefore help healthcare providers evaluate whether the immune system is producing an appropriate amount of antibodies.
The test may be useful when investigating recurrent or unusually severe infections, suspected antibody deficiencies, and certain autoimmune, inflammatory, liver, or blood-related conditions. It may also be used to monitor known immune disorders or changes in immunoglobulin levels.
An abnormal IgG level does not by itself identify a specific disease. Results should be interpreted along with symptoms, medical history, and other laboratory investigations.
IMMUNOGLOBULIN G (IGG) Test is Recommended for Individuals:
- Individuals with recurrent or persistent infections
- People suspected of having an antibody deficiency
- Individuals being evaluated for immune system disorders
- People with unusually frequent respiratory or other infections
- Individuals with suspected autoimmune or inflammatory conditions
- People being evaluated for abnormal immunoglobulin or protein levels
- Patients with certain liver or blood-related conditions, when clinically indicated
- Individuals undergoing monitoring for a known immune or immunoglobulin disorder
FAQs
1. What does the Immunoglobulin G (IgG) test measure?
The test measures the amount of IgG antibodies in the blood. IgG is an important part of the immune system and provides longer-term protection against many infections.
2. What can high IgG levels indicate?
Elevated IgG may occur with chronic or recurrent infections, ongoing inflammation, autoimmune conditions, liver disease, or certain blood disorders. Additional testing may be needed to determine the underlying cause.
3. What can low IgG levels indicate?
Low IgG may be associated with antibody deficiencies or impaired immune function and can contribute to recurrent infections. However, low levels can have several causes, so the result should be evaluated along with other immunoglobulins, symptoms, and clinical findings.