Hazelnut (Allergen Specific IgE)
Filbert, Hazelnut (f17) , Antrim #31419, EPIC: LAB5649, SOFT: EHAZ
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/Drawsite 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).
- Plasma specimens.
- Severely lipemic or hemolyzed specimens.
0,Centrifuged SST tubes may be transported
and stored at ambient temperatures (2o to 30o C; 36o to 86o
F) for up to 48 hours. DO NOT FREEZE TUBES CONTAINING BLOOD. For longer
storage, the serum should be removed from the gel and refrigerated (2o
- 8o C) or frozen at -20o C or below.
Red-top tubes and Microtainers® may be stored at ambient temperatures
for up to 16 hours and for up to 3 days at refrigerator temperatures (2o
- 8o C). DO NOT FREEZE TUBES CONTAINING BLOOD. For longer storage,
the serum should be removed from the clot and refrigerated (2o - 8o
C) or frozen at - 20o C or below.
0,Serum specimens (pour-overs) may be stored
at room temperature (20o to 26o C; 68o to 79o F) for up
to 1 week, refrigerator temperature (2o to 8o C; 36o to 47o
F) for two weeks, and at -20o C (-4o F) for up to 3 months. Specimens
stored at - 70o C (-94o F) can be stored indefinitely.
Monday - Friday.
Results available the next business day.
Allergy Reference Range: Less than 0.35 kU/L.
|Less than or equal to 0.34
|Greater than 100
Fluorescence Enzyme Immunoassay (FEIA).
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.
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.
Birch-alder-hazel pollen-sensitive individuals may react to ingestion of hazelnuts and possibly to apple and other fruits in the Rosaceae family.Persons with birch pollen sensitivity are noted to have hypersensitivity (53%) to hazel nuts compared to individuals that do not have an allergy to birch pollen(7%).
True food allergy is less common than popularly believed. It is estimated that only 1 to 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%.
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 constriction of the airways in more severe reactions. Individuals with food allergies will typically show symptoms of an allergic response within 45 minutes of ingestion of food. Reactions to food ingestion occurring several hours after consumption is usually 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 approximately 5-15 minutes after food consumption and can lead to difficulty in breathing, constriction of the airways, and unconsciousness.
Certain factors such as alcohol consumption and exercise appear to 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.
Antrim #31419, EPIC: LAB5649, SOFT: EHAZ