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Acremoniumiggrast

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

This blood test detects IgG antibodies against Acremonium mold species to help diagnose fungal exposure or allergic reactions.

Quick summary

{"Measures IgG antibodies against Acremonium mold in your blood","Helps doctors determine if you have been exposed to this specific fungus","Used to diagnose fungal allergies or hypersensitivity pneumonitis","A simple blood draw is all that is needed","Results help guide treatment for mold-related conditions"}

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

Key facts at a glance

LOINC
102986-7
Short code
ACRIGG
Synonyms
Acremonium IgG RAST
Category
chemistry
Sample
serum
Container
Serum separator tube (SST) or red top vacuum tube
Units
N/A
Ref low
0
Ref high
3.5
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
0–120 years
Method
Radioallergosorbent test (RAST)
CPT
86003
SNOMED
414558006
Specimen volume
1.0 mL minimum, 2.0 mL preferred
Stability
Room temperature: 24 hours; Refrigerated (2-8°C): 7 days; Frozen (-20°C or below): 30 days
Hemolysis max
50
Lipemia max
100
Icterus max
20
TAT
48–168 hours
Order
routine

What is this test?

The Acremonium sp. IgG Antibody test is a blood test that looks for IgG antibodies specifically directed against Acremonium species, which are types of mold commonly found in soil, decaying plants, and indoor environments. The test uses a method called Radioallergosorbent test (RAST) to detect whether your immune system has produced antibodies in response to exposure to this fungus.

Why might I need this test?

Your doctor may order this test if you have symptoms that suggest a fungal allergy or infection, such as chronic cough, shortness of breath, fatigue, fever, or unexplained allergic symptoms. It is particularly useful for diagnosing conditions like allergic bronchopulmonary aspergillosis or hypersensitivity pneumonitis (also known as "farmer's lung" or "bird fancier's lung"), which can be caused by repeated exposure to moldy environments.

How is the test performed?

A healthcare professional will draw a small sample of blood from a vein in your arm. The blood sample is then sent to a laboratory where it is analyzed using the RAST method. This test measures the presence and quantity of IgG antibodies specific to Acremonium species. No special preparation is typically needed before the test.

What do the results mean?

A positive result indicates that IgG antibodies against Acremonium were detected in your blood, suggesting past or current exposure to this mold. A negative result means no significant levels of antibodies were found. Your doctor will interpret these results along with your symptoms, medical history, and other test results to make a diagnosis and determine appropriate treatment.

Reference range

Negative: < 2.0 kU/L (Class 0); Equivocal: 2.0-3.5 kU/L (Class 1); Positive: > 3.5 kU/L (Class 2-6)N/A

Specimen: serum

No special preparation required. Patient may eat and drink normally before specimen collection. Inform the laboratory of any current medications, especially antihistamines or immunosuppressants, as these may affect results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

Is this test painful?
The test involves a simple blood draw, which may cause brief discomfort or a small bruise at the needle site, but most people find it minimally painful.
Do I need to fast before this test?
No special preparation, including fasting, is typically required for this blood test.
What is Acremonium mold?
Acremonium is a genus of fungi (mold) commonly found in soil, decaying vegetation, and indoor environments with moisture. It can cause infections in people with weakened immune systems and can trigger allergic reactions in sensitive individuals.
How long does it take to get results?
Results are typically available within a few days to a week, depending on the laboratory.
What happens if my test is positive?
A positive result suggests exposure to Acremonium mold. Your doctor will discuss treatment options, which may include avoiding moldy environments, improving indoor air quality, and possibly prescribing antihistamines or other medications to manage symptoms.
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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