Weed Allergen Mix 7-Specific IgE, Serum
A blood test that measures IgE antibodies to a panel of weed allergens, helping identify possible allergic sensitization.
["A positive result suggests an immune reaction to one or more tested weed allergens but must be interpreted with your symptoms and exposure history."]
Key facts at a glance
- LOINC
- 82044-9
- Short code
- Weed Allerg Mix7 IgE RAST
- Synonyms
- Weed Allerg Mix7 IgE RAST
- 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
- Method
- multidisk
- 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 test measures weed-specific IgE antibodies in a blood sample. It evaluates immune sensitization to a group of weed allergens; the exact allergens included in “Mix 7” may vary by laboratory.
Why might I need this test?
You may need this test if you have sneezing, watery eyes, a runny or blocked nose, wheezing, or cough during exposure to weeds. Your clinician may also use it to investigate a suspected pollen allergy.
How is the test performed?
A healthcare professional draws a small amount of blood from a vein. The sample is sent to a laboratory, where the lab measures IgE antibodies against the allergens in the weed mix.
How do I prepare for the test?
No special preparation is usually required. Tell your clinician about your allergy symptoms, recent exposures, and any medicines or treatments you are using, because these can affect interpretation.
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 indicates that your immune system has produced IgE antibodies to one or more weeds in the tested mix. This supports possible weed-pollen sensitization but does not by itself confirm that a particular weed causes your symptoms. Results should be compared with your exposure pattern, medical history, and sometimes skin-prick testing or other allergy evaluation.
Short name
Weed Allergen Mix 7 IgE
Frequently asked questions
Does a positive result mean I am allergic to every weed?
Can I have symptoms even if this test is negative?
How is this different from a skin-prick allergy test?
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