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Aspergillus fumigatus IgE Antibody, Serum — Qualitative (Deprecated LOINC Entry)

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

A blood test that detects IgE antibodies to Aspergillus fumigatus, a mold, to help evaluate allergic sensitization and certain fungal lung conditions.

Quick summary

["A positive result indicates an allergic immune response to Aspergillus fumigatus but does not by itself establish a specific diagnosis."]

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

Key facts at a glance

LOINC
15549-9
Short code
Deprecated A fumigatus IgE RAST Ql
Synonyms
Deprecated A fumigatus IgE 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 serum test looks for IgE antibodies directed against Aspergillus fumigatus, a mold commonly found in the environment. It helps assess whether a person has developed an allergic response to this mold. The listed test entry is deprecated, so the exact name and method used by your laboratory may differ.

Why might I need this test?

Your clinician may order this test if you have wheezing, recurrent lung infections, sinus symptoms, or worsening asthma and suspect an allergy to Aspergillus. It may also be used when evaluating conditions such as allergic bronchopulmonary aspergillosis.

How is the test performed?

A blood sample is collected and tested in the laboratory for Aspergillus fumigatus-specific IgE antibodies. The laboratory may report the result as positive or negative, or use another reporting method depending on the current assay.

How do I prepare for the test?

No special preparation is usually required for this blood test. Follow your clinician's instructions and tell the laboratory if you are taking medicines that could affect allergic or immune test results.

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

Aspergillus fumigatus IgE

Frequently asked questions

Does a positive result mean I have an Aspergillus infection?
No. It usually indicates allergic sensitization rather than an active fungal infection. Your clinician will interpret it alongside your symptoms and other test results.
What symptoms can be associated with Aspergillus allergy?
Possible symptoms include wheezing, cough, chest tightness, recurrent lung infections, and sinus congestion, particularly in people with asthma or cystic fibrosis.
Why was this test entry marked as deprecated?
A deprecated entry means the listed test definition may no longer be maintained or commonly used. Your laboratory may still offer an equivalent Aspergillus fumigatus IgE test under a different name or method.
  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