Reagin Antibody (Serum) – Total
This test measures the presence of reagin antibodies in your blood, which are linked to certain allergic reactions or hypersensitivity responses. These antibodies may be detected when your immune system reacts to substances it perceives as harmful.
["Reagin antibodies can help identify potential allergic sensitivities that may not cause immediate symptoms but could be relevant for certain conditions."]
Key facts at a glance
- LOINC
- 43813-5
- Short code
- Reagin Ab BldCo Ql
- Synonyms
- Reagin Ab BldCo Ql
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What Is a Reagin Antibody?
Reagin antibodies are a type of antibody (specifically IgE-related) that can be detected in the blood but are not always directly measured in standard allergy testing. They are often associated with allergic reactions or hypersensitivity, though their exact role can vary. This test may be used in specific clinical scenarios to assess immune response patterns.
Why Might This Test Be Ordered?
Your healthcare provider might order this test if you have symptoms suggestive of allergic reactions, such as skin rashes, respiratory issues, or other hypersensitivity responses, but standard allergy testing (like skin prick tests or specific IgE levels) has not provided clear answers. It may also be used in research or specialized diagnostic contexts.
How Is This Test Performed?
A small blood sample is drawn from a vein in your arm. The serum portion of the blood is then analyzed in a laboratory using an immunoassay method to detect the presence of reagin antibodies. Results are qualitative (positive or negative) rather than quantifiable.
What Do the Results Mean?
A positive result indicates the presence of reagin antibodies, which may suggest an underlying allergic or hypersensitivity condition. A negative result means no detectable antibodies were found in this test. Interpretation should always be done by your healthcare provider based on your clinical picture.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Reagin Antibody Test
Frequently asked questions
What could cause this test to be abnormal?
How long does it take to get results?
Can this test be done at home?
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