Pork-Specific IgG Antibodies, Radioallergosorbent Test (RAST), Qualitative — Deprecated
A qualitative blood test for antibodies to pork proteins using the RAST method. This test has been deprecated and may not be available.
["This deprecated test looks for pork-specific IgG antibodies, which indicate exposure but do not by themselves confirm a food allergy."]
Key facts at a glance
- LOINC
- 21475-9
- Short code
- Deprecated Pork IgG RAST Ql
- Synonyms
- Deprecated Pork 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 test examines a blood sample for IgG antibodies directed against proteins found in pork. It is performed using a radioallergosorbent test, or RAST, and reports the result as positive or negative rather than as a measured concentration.
Why might I need this test?
It may have been used to assess whether a person has developed antibodies to pork after eating it. Because this test is deprecated, a clinician may instead recommend a current food-allergy evaluation based on symptoms, medical history, and other allergy testing.
How is the test performed?
A laboratory uses the patient's serum to detect pork-specific IgG antibodies with the RAST method. The result is reported qualitatively as positive or negative.
How do I prepare for the test?
No special preparation is generally required for this blood test. Because the test is deprecated, contact the ordering clinician or laboratory before having it collected to confirm that it is available and whether an alternative test is recommended.
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 pork-specific IgG antibodies are present, which can occur after exposure to pork. Food-specific IgG antibodies do not by themselves establish a clinical pork allergy, and a negative result does not completely exclude sensitivity or allergy. Results should be interpreted by a clinician alongside symptoms and medical history.
Short name
Pork-specific IgG (RAST), qualitative
Frequently asked questions
Does a positive pork-specific IgG result mean I am allergic to pork?
What symptoms may be associated with a pork allergy?
Why is this test listed 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