Anti-IgA Antibody (IgA Immunoglobulin Class) in Serum or Plasma
This test measures the presence of antibodies directed against IgA, a type of antibody in your blood. These antibodies may indicate an immune response or an autoimmune condition.
This test helps diagnose or monitor conditions related to IgA deficiency or autoimmune reactions involving IgA.
Key facts at a glance
- LOINC
- 48063-2
- Short code
- G lamblia+C parvum Ag Stl Ql IA
- Synonyms
- G lamblia+C parvum Ag Stl Ql IA
- Category
- coagulation
- Sample
- stool
- Container
- Clean container
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ia
- Specimen volume
- 5 g
- Stability
- Refrigerated: 24h, Frozen: 7d
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Your healthcare provider may order this test if you have symptoms like recurrent infections, skin rashes, or other autoimmune symptoms. It may also be used to check for certain immune-related conditions or to evaluate why certain medications or treatments affect IgA levels.
What to Expect Before the Test
No special preparation is needed. You may have a blood sample drawn from a vein in your arm. If you’re concerned about needles, let your healthcare provider know so they can offer comfort measures.
What the Test Results Mean
Results can vary depending on the reason for testing. Elevated levels might suggest an immune response or autoimmune disease, while low levels could indicate IgA deficiency. Your provider will discuss these findings with you in the context of your overall health.
Common Conditions Monitored
This test is often used to diagnose or monitor conditions like IgA deficiency, certain autoimmune diseases (such as lupus or rheumatoid arthritis), or to check for immune system reactions to medications or vaccines.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical significance: Anti-IgA antibodies can be elevated in autoimmune diseases, infections, or allergic reactions. Low IgA levels may predispose individuals to recurrent infections or certain autoimmune disorders. Your provider will interpret results alongside your clinical picture to guide diagnosis or treatment planning.
Short name
IgA Antibody Test
Frequently asked questions
What does an abnormal IgA antibody test result mean?
How often should I get this test?
Can I eat or drink before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy