Aspergillus fumigatus Asp f 6-Specific IgE Antibody, Qualitative
This blood test checks for IgE antibodies to the fungal allergen Asp f 6, which may be produced by Aspergillus fumigatus.
["A positive result indicates IgE sensitization to Aspergillus fumigatus, but it does not by itself diagnose an active allergy or fungal infection."]
Key facts at a glance
- LOINC
- 51572-6
- Short code
- Deprecated A fumigatus (rAsp f) 6 IgE RAST Ql
- Synonyms
- Deprecated A fumigatus (rAsp f) 6 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 qualitative blood test detects allergen-specific IgE antibodies directed against Asp f 6, an allergen associated with Aspergillus fumigatus. These antibodies are part of the immune system's response to fungal exposure.
Why might I need this test?
This test may help evaluate suspected Aspergillus sensitization in people with allergic respiratory symptoms, such as wheezing, coughing, or recurrent nasal and sinus problems. It may also be used as part of an allergy evaluation alongside other clinical findings and tests.
How is the test performed?
A blood sample is analyzed in the laboratory to determine whether IgE antibodies to Asp f 6 are present. The result is reported qualitatively, generally as positive or negative.
How do I prepare for the test?
No special preparation is usually required. Some antihistamines and certain other allergy treatments can affect results, so tell the healthcare provider about all medications and supplements you are taking. Do not stop prescribed medicine unless instructed.
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.
A positive result shows that the immune system has produced IgE antibodies to Asp f 6, indicating sensitization to this Aspergillus allergen. When interpreted with symptoms and exposure history, it may support allergic disease or allergic bronchopulmonary aspergillosis. It does not confirm an active fungal infection, and a negative result does not rule out allergy caused by other allergens.
Short name
Aspergillus fumigatus Asp f 6 IgE Antibody
Frequently asked questions
Does a positive result mean I have an Aspergillus infection?
What symptoms may be related to Aspergillus sensitization?
Can medications affect the test 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