Cantaloupe-Specific IgG Antibody, Qualitative (RAST) — Deprecated
A legacy, deprecated blood test for antibodies directed against cantaloupe. Because RAST usually refers to IgE testing, confirm the antibody type with the laboratory.
["Detectable cantaloupe-specific IgG may indicate prior exposure but does not by itself diagnose a cantaloupe allergy."]
Key facts at a glance
- LOINC
- 57877-3
- Short code
- Deprecated Cantaloupe IgG RAST Ql
- Synonyms
- Deprecated Cantaloupe 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 is a qualitative test that checks a blood sample for antibodies associated with cantaloupe exposure. The test name includes RAST, a term most commonly used for IgE antibody testing, even though this slug specifies IgG.
Why might I need this test?
It may have been used to evaluate a suspected food-related reaction or to assess immune sensitization to cantaloupe. Because the test is deprecated, a current food-allergy evaluation may use other allergy tests and clinical history instead.
How is the test performed?
A blood sample is analyzed for cantaloupe-specific antibodies, and the result is reported as detectable or not detectable. The laboratory should confirm whether the assay measures IgG or IgE.
How do I prepare for the test?
No special preparation is generally required for a qualitative antibody blood test, and fasting is usually unnecessary. Follow any instructions provided by the ordering clinician or laboratory, and do not stop prescribed medications without medical advice.
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 cantaloupe-specific IgG generally indicates previous exposure and may be associated with tolerance rather than allergy. It should not be used alone to diagnose a cantaloupe allergy; symptoms, exposure history, and testing for allergy-specific IgE are more informative. Because RAST commonly measures IgE, the reported antibody type should be verified before interpreting the result.
Short name
Cantaloupe IgG antibody test
Frequently asked questions
Does a positive result mean I am allergic to cantaloupe?
Why is this test marked as deprecated?
Should I avoid eating cantaloupe because of this result?
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