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Oat (Allergen Specific IgE)

Oat (f7)

Test Codes

EPIC: LAB2111667, SOFT: EOT, Antrim #31534

Department

Immunology

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 Chemistry 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

Positive assay results indicate a high probability of allergic disease. Negative assay results effectively rule out allergy induced by those allergens.

Clinical Disease

True food allergy is less common than popularly believed. It is estimated that only between 1% and 4% of the general population suffers from a definite food allergy. Food allergy tends to be more common in children (up to 6%) than adults. In selected groups, such as children with eczema, the prevalence of food allergy may be as high as 25%.

Food allergies occur in approximately 2% of the adult population in the United States. The majority of the food allergies are due to the consumption of milk, egg, wheat, peanut, soy, tree nuts, fish and shellfish, however, allergic responses can occur with all types of food in a sensitized individual.

General symptoms of an allergy to food include nausea, vomiting, diarrhea, hives, itching, swelling of the mouth, tongue and/or lips, wheezing, and in more severe reactions constriction of the airways. Individuals with food allergies will typically show symptoms of an allergic response within 45 minutes of ingestion. Reactions to food ingestion that occur several hours after consumption of the offending food agent is usually a result of a problem in the digestive system and is not related to allergies.

An anaphylactic reaction to food, which is life-threatening, occurs in approximately 1 million individuals each year according to the National Institutes of Health.

Anaphylactic reactions are most commonly found in patients with allergies to peanuts, nuts, eggs, fish and shellfish. Anaphylactic responses occur almost immediately, approximately 5-15 minutes after food consumption and lead to difficulty in breathing and unconsciousness due to the intense swelling and constriction of the airways.

Certain factors such as alcohol consumption and exercise enhance the reactivity to a food allergen in sensitized individuals. Individuals with food allergies usually have other allergies as well, including allergies to pollen or dust.

CPT Codes

86003
LOINC: 6190-3

Contacts

Last Updated

11/7/2024