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Kiwi Fruit-Specific IgG Antibody, Radioallergosorbent Test (RAST), Qualitative

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

A qualitative blood test that detects IgG antibodies to kiwi fruit. This deprecated test may reflect previous exposure but does not diagnose kiwi allergy.

Quick summary

["A positive result shows kiwi-specific IgG antibodies but does not by itself mean you have a kiwi allergy."]

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

Key facts at a glance

LOINC
33296-5
Short code
Deprecated Kiwifruit IgG RAST Ql
Synonyms
Deprecated Kiwifruit 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 qualitative blood test looks for IgG antibodies directed against kiwi fruit. IgG is an immune-system protein that can develop after exposure to a food.

Why might I need this test?

The test may have been used to evaluate a reported reaction to kiwi or to document food-specific immune sensitization. It has been deprecated and is not generally recommended as a stand-alone test for food allergy.

How is the test performed?

A blood sample is tested with kiwi fruit antigen, and the result is reported as positive or negative. The laboratory may use a radioallergosorbent-type method or another validated antibody assay.

How do I prepare for the test?

No special preparation is usually required. Tell your clinician about any kiwi reaction, other food allergies, recent illness, and any immunosuppressive medicines, because these factors may affect interpretation.

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.

A positive result indicates that kiwi-specific IgG antibodies are present, which may reflect previous exposure or sensitization. It does not establish clinical allergy, predict the severity of a reaction, or replace testing for allergy-specific IgE when a true food allergy is suspected.

Short name

Kiwi Fruit IgG RAST (Qualitative)

Frequently asked questions

Does a positive kiwi IgG result mean I am allergic to kiwi?
No. Food-specific IgG can occur in people who tolerate a food and is not a reliable marker of clinical allergy. Your clinician should interpret the result alongside your symptoms and medical history.
Is this test still commonly used?
This test is deprecated and is not routinely recommended for evaluating suspected food allergy. Current evaluation usually relies on the clinical history, sometimes supported by skin-prick or blood testing for allergy-specific IgE.
What should I do if I react after eating kiwi?
Stop eating kiwi and discuss the reaction with a healthcare professional, especially if you have swelling, breathing difficulty, wheezing, dizziness, or widespread hives. Seek urgent care for severe breathing problems or symptoms affecting more than one body system.
  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