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English Plantain (Allergen Specific IgE)

Plantago lanceolata, English Plantain (w9)

Test Codes

Antrim #31805, EPIC: LAB5630, SOFT: EENP

Department

Special Testing Allergens

Specimen Collection Criteria

Collect: One Gold-top SST tube.

Twenty individual allergen assays or allergen screens can be performed on one 5 mL Gold-top SST tube. Each allergen assay requires 100 mcL of serum.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then immediately centrifuge to separate serum from cells. Refrigerate (2-8°C or 36-46°F) the centrifuged collection tube within two hours of collection.

Preparation for Courier Transport

Transport: Centrifuged collection tube, refrigerated (2-8°C or 36-46°F).

Rejection Criteria

Plasma specimens.

Severely lipemic or hemolyzed specimens.

In-Lab Processing

Let specimen clot 30-60 minutes then immediately centrifuge to separate serum from cells. Room temperature is acceptable for a maximum of two hours.

Storage

Specimen Stability for Testing:

Centrifuged SST Tubes and Microtainers^® with Separator Gel
Room Temperature (20-26°C or 68-78.8°F): 2 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): Unacceptable

Red-top Tubes and Microtainers^® without Separator Gel
Room Temperature (20-26°C or 68-78.8°F): 2 hours
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): Unacceptable

Serum Specimens (Pour-Overs)
Room Temperature (20-26°C or 68-78.8°F): 2 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): 1 month

Specimen Storage in Department Prior to Disposal:

Refrigerated (2-8°C or 36-46°F): 7 days

Laboratory

Royal Oak Special Testing Laboratory

Performed

Monday – Friday.
Results available the next business day.

Reference Range

Allergy Reference Range: Less than 0.35 kU/L. 

Range (kU/L)	Class	Interpretation
Less than or equal to 0.34	0	Negative
0.35-0.69	1	Low
0.70-3.49	2	Medium
3.50-17.49	3	High
17.50-49.99	4	Very High
50.0-100.0	5	Very High
Greater than 100	6	Very High

Test Methodology

Fluorescence Enzyme Immunoassay (FEIA).

Interpretation

The allergen class may not be predictive of clinical disease in some patients. The diagnosis of allergy should be based upon patient history and clinical findings. The diagnosis of allergy should not be based upon laboratory findings alone.

Clinical Utility

A positive test result (class 1 or greater) is indicative of the presence of allergen-specific IgE and suggests an increased likelihood of allergic disease.

Clinical Disease

In North America, the English plantain flowers from early May to October.(1) The plantain pollen causes pollinosis throughout North America, particularly in the eastern coastal region, the Northwest, and California. A high incidence of cross-reactivity among the member of the family Plantaginaceae (200 species) has been demonstrated. Cross-reactivity to different plant families has not been demonstrated. This allergen causes a high frequency of allergic reactions, primarily hay fever. Symptoms can include sneezing, wheezing, shortness of breath, itching of the nose, eyes, and palate, and watery nose and eyes. Allergy sufferers can be irritable and develop frequent headaches.(3) Pollen has been shown as a potential source of seasonal urticaria. (2)

Reference

1. Patterson, Roy, L. C. Grammar, P. A. Greenberger, C. R. Zeiss. Allergic Disease: Diagnosis and Management, 4th ed., J.B. Lippincott Co.: Philadelphia, 1993, pg. 116.
2. Korenblat, Phillip E. M.D., H. James Wedner, M.D. Allergy: Theory and Practice. W. B. Saunders Company: Philadelphia, 1992, pg. 219, 489.
3. Kaplan, Allen P, M.D., Allergy. Churchill Livingstone: New York, 1985, pg. 272

CPT Codes

86003
LOINC: 6110-1

Contacts

Last Updated

2/21/2023