Normal Reference Range:

• Adults: 70–400 mg/dL my.clevelandclinic.org

• Children: Levels vary by age; for example, children aged 1–3 years may have levels up to 94 mg/dL uncmedicalcenter.org

Test Components:

• IgA (Immunoglobulin A): A type of antibody found in mucous membranes lining the respiratory and gastrointestinal tracts, playing a crucial role in immune defense.

Clinical Applications:

• Infections: Elevated IgA levels may indicate chronic infections or inflammatory responses.

• Autoimmune Diseases: Conditions like rheumatoid arthritis and systemic lupus erythematosus can present with increased IgA levels.

• IgA Deficiency: Low IgA levels may suggest selective IgA deficiency, increasing susceptibility to infections.

Interpretation:

• Normal Result: IgA levels within the reference range suggest normal immune function.

• Elevated Result: Higher IgA levels may indicate chronic inflammation, autoimmune disorders, or certain cancers.

• Low Result: Reduced IgA levels can be associated with immunodeficiency conditions, leading to increased infection risk.

Next Steps:

If your IgA test results are outside the normal range, consult with your healthcare provider for further evaluation and appropriate management. Additional tests or referrals to specialists may be necessary to determine the underlying cause and develop a treatment plan.