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Aureobasidium pullulans IgG Antibody Test — Qualitative (Deprecated)

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

A qualitative test that detects IgG antibodies to the fungus Aureobasidium pullulans, which may be present in indoor air.

Quick summary

["A positive result shows that antibodies to A. pullulans are detectable but does not by itself confirm a mold allergy."]

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

Key facts at a glance

LOINC
33276-7
Short code
Deprecated A pullulans IgG RAST Ql
Synonyms
Deprecated A pullulans 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 test looks for IgG antibodies directed against Aureobasidium pullulans, a fungus that can occur in damp indoor environments. It is marked as deprecated, so it may not be available or routinely offered.

Why might I need this test?

The test may have been used to assess prior exposure or immune sensitization to this fungus, particularly in a person with respiratory symptoms and possible mold exposure. It may be included as part of a broader evaluation for environmental allergies.

How is the test performed?

A laboratory analyzes a patient sample for antibodies to A. pullulans. The result is reported qualitatively, generally as detectable or not detectable, and the laboratory's specific specimen and testing method should be confirmed.

How do I prepare for the test?

No special preparation is usually needed for an antibody test, but instructions from the ordering clinician or laboratory should be followed. Tell the healthcare team about medicines, immune conditions, or recent infections that could affect the result.

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.

◆Associated findings1

Short name

A. pullulans IgG antibody

Frequently asked questions

Does a positive result mean I have a mold allergy?
No. The test shows that antibodies are detectable, but it does not alone confirm that the fungus is causing an allergy or other illness.
What does a negative result mean?
It means that detectable IgG antibodies were not found at the time of testing. It does not completely exclude prior exposure, early sensitization, or allergy.
Why is this test called deprecated?
A deprecated test is one that is no longer routinely recommended, current, or widely available. Ask the ordering clinician whether a newer or more appropriate allergy test should be used.
  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