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Understanding Your Laboratory Test: A Guide for Patients

Published: August 9, 2026Updated: August 16, 2026

This test measures IgE antibodies against Aspergillus fumigatus (a common mold) in your blood to help diagnose allergic conditions.

Quick summary

{"Detects IgE antibodies specific to Aspergillus fumigatus mold","Helps diagnose allergic bronchopulmonary aspergillosis (ABPA) and other allergic reactions","Performed on a blood sample using immunoassay technology","Results assist doctors in managing respiratory allergies and asthma","Elevated levels may indicate an allergic response to this fungus"}

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
112148-2
Short code
A fumgtus IgE Qn IA
Synonyms
A fumgtus IgE Qn IA
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
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, and why might my doctor have ordered it for me?

The Aspergillus fumigatus IgE antibody test is a blood test that measures the level of immunoglobulin E (IgE) antibodies specifically directed against Aspergillus fumigatus, a type of mold commonly found in the environment. This test uses immunoassay technology to detect and quantify these antibodies in your serum or plasma sample.

Why is this test important for my health and my ongoing medical care?

Aspergillus fumigatus is one of the most common airborne fungal pathogens. Some individuals develop allergic reactions when they inhale its spores, leading to conditions such as allergic bronchopulmonary aspergillosis (ABPA), allergic fungal sinusitis, or asthma exacerbations. This test helps your healthcare provider determine if you have developed an allergic sensitization to this specific mold.

How is this test performed, and what can I expect during the procedure?

A healthcare professional will draw a small blood sample from a vein in your arm. The sample is then sent to a laboratory where immunoassay techniques are used to measure the IgE antibody levels against Aspergillus fumigatus. No special preparation is typically required, but follow your doctor's instructions regarding any medications or fasting requirements.

What do the results of this test mean for my diagnosis and treatment plan?

Elevated IgE levels to Aspergillus fumigatus suggest that your immune system has produced antibodies in response to exposure to this mold, indicating an allergic sensitization. Your doctor will interpret these results in conjunction with your symptoms, medical history, and other test results to make an accurate diagnosis and develop an appropriate treatment plan.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

The Aspergillus fumigatus IgE test is primarily used to diagnose and monitor allergic bronchopulmonary aspergillosis (ABPA), a condition that affects people with asthma or cystic fibrosis. It is also useful in evaluating patients with chronic allergic conditions, unexplained respiratory symptoms, or suspected fungal allergies. The test helps differentiate between allergic and infectious forms of aspergillosis, guide treatment decisions, and monitor response to antifungal or corticosteroid therapies.

Frequently asked questions

Do I need to fast before this test?
No, fasting is typically not required for this blood test. You can eat and drink normally unless your doctor instructs otherwise.
How long does it take to get results?
Results are usually available within a few days to a week, depending on the laboratory's processing time.
What are the symptoms of Aspergillus allergy?
Common symptoms include wheezing, shortness of breath, cough, fever, and worsening asthma symptoms. Some patients may also experience sinus congestion, headaches, or allergic skin reactions.
Is this test dangerous?
The test involves a routine blood draw, which carries minimal risks such as slight bruising, bleeding, or dizziness at the puncture site.
Can this test diagnose ABPA alone?
No, ABPA diagnosis requires a combination of clinical criteria, including symptoms, imaging studies, and other laboratory tests such as total IgE levels and Aspergillus precipitins.
  1. 1
    Mayo Clinic - Allergic bronchopulmonary aspergillosisSource
  2. 2
    American College of Allergy, Asthma & Immunology - AspergillosisSource
  3. 3
    MedlinePlus - Allergy TestingSource

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 16, 2026. · Read our editorial policy