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Alternaria alternata Basophil-Bound Antibody, Qualitative

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

A qualitative test for antibodies to the mold Alternaria alternata, which may indicate sensitization to this allergen.

Quick summary

["A positive result suggests an immune reaction to Alternaria alternata, but it must be interpreted alongside symptoms and exposure history."]

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

Key facts at a glance

LOINC
7077-1
Short code
A alternata BasoBnd Ab Qn
Synonyms
A alternata BasoBnd Ab Qn
Category
liver
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Ref low
7
Ref high
56
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
lhr
CPT
84484
SNOMED
302773008
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What is this test?

This test checks your blood for antibodies that recognize Alternaria alternata, a mold commonly found indoors and outdoors. A basophil-based laboratory method is used to determine whether allergen-specific antibodies are present.

Why might I need this test?

Your clinician may order this test if you have wheezing, nasal congestion, sneezing, eye irritation, or other symptoms that occur after exposure to mold or damp environments.

How is the test performed?

A blood sample is analyzed in the laboratory using a basophil-based assay. Because this is a qualitative test, the result is generally reported as positive or negative.

How do I prepare for the test?

No special preparation is usually required. Tell your clinician about any medicines you take, particularly antihistamines, because some allergy medicines can affect results; do not stop prescribed medication without guidance.

Reference range

Adult males: 7-56 U/L; Adult females: 7-43 U/LN/A

Specimen: whole-blood

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

Alternaria alternata antibody

Frequently asked questions

What does a positive result mean?
It means antibodies to Alternaria alternata were detected. Your clinician will consider whether this finding matches your symptoms and possible mold exposure.
Does a positive result mean I definitely have a mold allergy?
No. It shows immune sensitization, which may or may not explain your symptoms. Exposure history and the timing of symptoms are important.
Can I take allergy medicine before this test?
Ask your clinician first, because antihistamines and some other allergy treatments may affect the result. Do not stop prescribed medication without medical advice.
  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