###1: Helminthosporium-Specific IgE Antibody Test (RAST)
###3: This blood test measures IgE antibodies directed against Helminthosporium, a mold that can cause respiratory allergy. A positive result indicates sensitization to this mold.
["###4: A positive result supports mold allergy sensitization but must be interpreted with symptoms and other allergy tests."]
Key facts at a glance
- LOINC
- 102363-9
- Short code
- Helminthosporium IgE RAST
- Synonyms
- Helminthosporium IgE RAST
- Category
- chemistry
- 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
- Method
- rast
- 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
###5: What the Test Measures
###6: The test detects allergen-specific IgE antibodies to Helminthosporium mold. These antibodies are part of the immune system's response to exposure and are commonly measured using a RAST-style blood assay.
###7: Why It May Be Ordered
###8: This test may be ordered when a person has symptoms such as sneezing, nasal congestion, wheezing, or cough after exposure to molds. It may also help evaluate suspected mold-related allergy.
###9: Preparing for the Test
###10: A blood sample is required, so there is usually no need to stop allergy medicines unless your healthcare professional specifically instructs you to do so. Tell the clinician about any medications, recent treatments, and relevant exposures.
###11: Understanding the Result
###11: A positive result means that IgE antibodies to Helminthosporium are present. Results should be considered alongside the degree of exposure, symptoms, medical history, and other allergy tests because sensitization does not always cause clinical disease.
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.
###13: Clinical Significance: Helminthosporium-specific IgE can support the evaluation of respiratory allergy or unexplained symptoms associated with mold exposure. It cannot by itself determine which symptoms are caused by this mold, and a negative result does not exclude every mold allergy.
Short name
###2: Helminthosporium IgE
Frequently asked questions
###14: Does a positive result mean I am allergic to Helminthosporium mold?
###16: Can this test explain wheezing or nasal symptoms?
###18: What should I do if the result is positive?
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.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy