Understanding Lab Tests for IgG Deficiency
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
IgG deficiency is an immunodeficiency disorder where the immune system produces insufficient levels of Immunoglobulin G (IgG) antibodies. IgG is the most abundant antibody in the blood and plays a crucial role in protecting against bacterial and viral infections. Proper diagnosis requires specific blood tests to measure immunoglobulin levels.
Top Recommended Test
Immunoglobulins Panel, Serum
This comprehensive panel measures all major immunoglobulin types in the blood, including IgG. Low levels of IgG detected through this test can indicate an immunodeficiency disorder, where the immune system doesn't produce enough antibodies to fight infection. This is the primary diagnostic test for confirming IgG deficiency.
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Diagnosing IgG Deficiency
Since IgG deficiency can lead to recurrent infections and compromised immune function, accurate diagnosis through blood testing is essential. These tests directly measure the levels of immunoglobulins in the blood, allowing healthcare providers to identify deficiencies and develop appropriate treatment plans.
Other Relevant Tests
Avocado (f96) IgG
This specific IgG test can serve as a supporting diagnostic tool. Low levels of Avocado (f96) IgG might suggest a deficiency in the production of IgG antibodies, which may be indicative of an underlying immune disorder. This test can provide additional evidence of broader IgG production issues and would typically prompt further comprehensive testing to confirm the diagnosis.
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Understanding Your Results
IgG deficiency is diagnosed when blood levels of IgG antibodies fall below normal ranges for age. The severity can vary, and some individuals may have selective deficiencies affecting specific types of IgG subclasses. Your healthcare provider will interpret results in the context of your symptoms and medical history.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment of immune system disorders.
