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###1: Horse Dander-Specific IgE Antibody Test

Published: August 9, 2026Updated: August 17, 2026

###3: This test measures IgE antibodies directed against proteins in horse dander. It can help evaluate whether horse exposure may cause an immediate allergic reaction.

Quick summary

["###4: A positive result suggests sensitization to horse dander, but it must be interpreted with symptoms and other allergy evaluations."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
102379-5
Short code
Horse Dander IgE RAST
Synonyms
Horse Dander IgE RAST
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
rast
CPT
84484
SNOMED
302774002
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

###5: What the Test Measures

###6: The test detects allergen-specific IgE antibodies that bind to horse dander proteins. These antibodies are part of the immune response associated with immediate allergies.

###7: When the Test Is Used

###8: This test may be used when a person has symptoms such as hives, wheezing, cough, or swelling after contact with horses or horse-related products. It may also be considered before planned horse exposure.

###9: Understanding the Result

###10: A positive result indicates that the immune system has recognized horse dander, but it does not by itself prove that symptoms are caused by horse allergy. A negative result may make horse dander less likely to explain the symptoms.

###11: Additional Evaluation

###12: Results should be reviewed alongside exposure history, examination findings, and sometimes skin-prick testing or other allergy evaluation. Prior sensitization and antibodies may persist even when horse exposure has stopped.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

###2: Horse dander IgE

Frequently asked questions

###14: Does a positive result mean I am allergic to horses?
###15: It indicates sensitization to horse dander, but it does not alone confirm clinical allergy. A clinician should interpret it with symptoms, timing of exposure, and other relevant findings.
###16: Can I have a positive result without symptoms?
###17: Yes. Allergen-specific IgE can be present without an active allergic reaction, so a positive result should not automatically be treated as proof of symptomatic allergy.
###18: Can this test replace skin-prick testing?
###19: It may complement rather than replace skin-prick testing. The most appropriate testing approach depends on the clinical situation and is selected by an allergy professional.
  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 17, 2026. · Read our editorial policy