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Reaginic antibody (serum/plasma) by immunoassay

Published: August 9, 2026Updated: August 16, 2026

This test measures the presence of reaginic antibodies, a type of immunoglobulin E (IgE) that may be elevated in certain allergic or hypersensitivity reactions.

Quick summary

["Reaginic antibodies can help diagnose or monitor conditions linked to allergic responses."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
108664-4
Short code
Reagin Ab Msmt Ser Donr
Synonyms
Reagin Ab Msmt Ser Donr
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Is This Test Measuring?

Reaginic antibodies are a subset of IgE antibodies that can trigger allergic reactions, including asthma, hay fever, or other hypersensitivity responses. This test detects their concentration in your blood, often used to assess potential allergic sensitivity or response to specific allergens.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like skin rashes, respiratory issues, or other signs of an allergic reaction. It may also be used in research or specialized diagnostic contexts to evaluate immune responses to certain substances.

Sample Collection and Preparation

A blood sample is drawn from a vein, typically in your arm. The sample is processed into serum or plasma for testing. This test does not require fasting or special preparation beyond standard blood draw procedures.

What Does a Positive Result Mean?

A positive result indicates the presence of reaginic antibodies, which may suggest an allergic or hypersensitivity reaction. However, results alone do not confirm a specific diagnosis; they are often interpreted alongside clinical symptoms and other test results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Reaginic antibody test

Frequently asked questions

What Are Common Causes or Triggers?
Reaginic antibodies are typically associated with allergic conditions, such as allergic asthma or certain hypersensitivity reactions. They may also appear in research settings studying immune responses to allergens or other substances.
How Often Is This Test Used?
This test is less commonly used in routine clinical practice compared to standard allergy testing (e.g., skin prick tests or IgE measurements). It may be utilized in specialized research or diagnostic scenarios, particularly when studying specific immune responses.
What Are Possible Side Effects or Risks?
Possible side effects from blood drawing include mild bruising, soreness, or a slight reaction at the injection site. Rarely, more serious reactions like fainting or infection may occur, though these are uncommon.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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