Beef-Specific Immunoglobulin G Antibody, Qualitative — Radioallergosorbent Test (Deprecated)
A legacy blood test that looked for antibodies to beef proteins. It is not a current diagnostic test for food allergy.
["A positive result shows prior exposure to beef proteins but does not by itself confirm a beef allergy."]
Key facts at a glance
- LOINC
- 21106-0
- Short code
- Deprecated Beef IgG RAST Ql
- Synonyms
- Deprecated Beef IgG RAST Ql
- Category
- liver
- 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
- 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 was used to detect beef-specific IgG antibodies in a blood sample. IgG antibodies can develop after exposure to a food and are different from the IgE antibodies usually evaluated when a food allergy is suspected.
Why might I need this test?
It may appear in older records from an evaluation of food-related symptoms. Because the test is obsolete and IgG results do not establish allergy, it is generally not used for current diagnosis or treatment decisions.
How is the test performed?
A blood sample is analyzed with a legacy radioallergosorbent method for antibodies that bind to beef proteins. The result was reported as positive, negative, or otherwise qualitative rather than with a broadly applicable concentration range.
How do I prepare for the test?
No special preparation is generally required for this type of blood test. If the test is being reconsidered, tell your clinician about any food allergy, medication, or immune-related conditions that could affect interpretation.
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.
A positive result indicates that IgG antibodies to beef proteins were detected, which may reflect previous exposure or sensitization. It does not prove that beef causes allergic symptoms. If a food allergy is suspected, a clinician may recommend a current evaluation using medical history, allergy testing, and possibly a supervised food challenge.
Short name
Beef-specific IgG antibody test
Frequently asked questions
Does a positive beef-specific IgG result mean I am allergic to beef?
Is this test still commonly used?
What should I do if this result is on my medical record?
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