Deprecated Chicken-Specific IgG Antibody, Radioallergosorbent Test (RAST), Qualitative
A legacy qualitative blood test for IgG antibodies to chicken proteins. It is not a standard way to diagnose chicken allergy.
["A positive result shows an immune response to chicken proteins but does not by itself mean you have a chicken allergy."]
Key facts at a glance
- LOINC
- 21182-1
- Short code
- Deprecated Chicken IgG RAST Ql
- Synonyms
- Deprecated Chicken IgG RAST Ql
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- — – 10000 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- 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
What is this test?
This deprecated test is designed to detect chicken-specific IgG antibodies in a blood sample using a radioallergosorbent test, or RAST, approach. The qualitative result is reported as positive, negative, or sometimes borderline.
Why might I need this test?
It may have been ordered to evaluate an immune response to chicken or chicken proteins. However, food-specific IgG testing is not routinely recommended for diagnosing food allergy, and results should be interpreted with your symptoms and medical history.
How is the test performed?
A laboratory analyzes the blood sample for antibodies directed against chicken proteins. Because this is a qualitative test, it generally identifies the presence of these antibodies rather than providing a precise antibody concentration.
How do I prepare for the test?
No special preparation is usually required, although the ordering laboratory may have specific instructions. Tell your clinician about any reactions after eating chicken and do not make major dietary changes based on this result alone unless advised.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Detectable chicken-specific IgG may indicate prior exposure or an immune response to chicken proteins. It does not by itself establish a food allergy or predict the severity of a reaction. A clinician should interpret the result alongside your history, other allergy testing, and, when appropriate, medical supervision.
Short name
Chicken IgG RAST
Frequently asked questions
What does a positive chicken IgG RAST result mean?
Does this test diagnose a chicken allergy?
Why is this test marked as deprecated?
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 17, 2026. · Read our editorial policy