Allergens, Weed Profile
Ordering Recommendation
Quantitative ImmunoCAP Fluorescent Enzyme Immunoassay
1-2 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
Multiple patient encounters should be avoided. 
Serum separator tube. Multiple specimen tubes should be avoided. 
Specimen Preparation
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1.45 mL serum to an ARUP Standard Transport Tube. (Min: 0.72 mL) 
Storage/Transport Temperature
Unacceptable Conditions
Hemolyzed, icteric, or lipemic specimens. 
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year 
Reference Interval
Allergens included: Common/Short Ragweed, Dandelion, English Plantain, False Ragweed, Giant ragweed, Kochia/Firebush, Lamb's Quarters, Marsh Elder, Mugwort, Pigweed, Russian Thistle, Sagebrush, Western Ragweed.

Effective 02/18/2014
Reporting Range
(reported in kU/L)
Probability of IgE Mediated
Clinical Reaction
Class Scoring
Less than 0.10No significant level detected0
0.10 - 0.34Clinical relevance undetermined0/1
0.35 - 0.70Low1
0.71 - 3.50Moderate2
3.51 - 17.50High3
17.51 - 50.00Very high4
50.01 - 100.00Very high5
Greater than 100.00Very high6

Interpretive Data
Allergen results of 0.10-0.34 kU/L are intended for specialist use as the clinical relevance is undetermined. Even though increasing ranges are reflective of increasing concentrations of allergen-specific IgE, these concentrations may not correlate with the degree of clinical response or skin testing results when challenged with a specific allergen. The correlation of allergy laboratory results with clinical history and in vivo reactivity to specific allergens is essential. A negative test may not rule out clinical allergy or even anaphylaxis.

Hotline History
Component Test Code*Component Chart NameLOINC
0050910Allergen, Weed, Marsh Elder IgE7484-9
0055014Allergen, Weed, False Ragweed IgE6115-0
0055018Allergen, Weed, Kochia/Firebush IgE6118-4
0055021Allergen, Weed, Mugwort IgE6183-8
0055025Allergen, Weed, Pigweed IgE7604-2
0055027Allergen, Weed, Russian Thistle IgE6234-9
0055029Allergen, Weed, Sagebrush/Wormwood IgE6286-9
0055035Allergen, Weed, Western Ragweed IgE6275-2
0055041Allergen, Interp, Immunocap Score IgE33536-4
0055049Allergen, Weed, English Plantain IgE6110-1
0055084Allergen, Weed, Giant Ragweed IgE6124-2
0055085Allergen, Weed, Common/Short Ragweed IgE6085-5
0055086Allergen, Weed, Dandelion IgE6097-0
0055160Allergen, Weed, Lambs Quarters IgE6156-4
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.