Alternaria alternata and Alternaria farinae IgG Antibodies, Qualitative
Qualitative test for IgG antibodies to the molds Alternaria alternata and Alternaria farinae, which may indicate prior exposure.
["A positive result means IgG antibodies to these molds were detected, but it does not by itself confirm a mold allergy."]
Key facts at a glance
- LOINC
- 30031-9
- Short code
- A alternata+D farinae IgG Ql
- Synonyms
- A alternata+D farinae IgG Ql
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- 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
- multidisk
- CPT
- 84484
- SNOMED
- 302773008
- 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 checks for IgG antibodies to two molds: Alternaria alternata and Alternaria farinae. These antibodies can develop after exposure to mold.
Why might I need this test?
It may be used to assess possible exposure to these molds in people with respiratory or skin symptoms. Because IgG antibodies can occur without an allergy, results are considered with symptoms, medical history, and other allergy testing.
How is the test performed?
The laboratory uses an antibody-based assay to determine whether IgG to either mold is present. The result is reported qualitatively, usually as detected or not detected.
How do I prepare for the test?
No special preparation is usually required for this type of antibody test. Follow any instructions provided by the laboratory, particularly if a blood sample must be collected.
Reference range
Adult males: 7-56 U/L; Adult females: 7-43 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.
Detection of IgG antibodies generally indicates prior exposure or sensitization to these molds. It does not by itself establish that mold is causing symptoms or confirm an allergy; an allergist may interpret the result alongside symptom timing, exposure history, skin testing, and IgE testing.
Short name
Alternaria IgG antibody test
Frequently asked questions
Does a positive result mean I have a mold allergy?
What does a negative result mean?
How are these molds commonly encountered?
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