Tree Nut and Peanut Allergy IgE Blood Test

What is the purpose of this test?

Order this Tree Nut & Peanut Allergy Blood Test to measure the IgE antibody levels in the blood to screen for an allergy to certain tree nuts and peanuts. Nuts are a common food allergen in the United States, making up 1.8% of food allergy cases. Although peanuts are not classified as nuts (they are legumes), they contain similar proteins to tree nuts. Therefore, individuals allergic to peanuts may also be allergic to tree nuts, such as almonds, Brazil Nuts, pecans, walnuts, hazelnuts, and cashews. Most food allergies develop in childhood. Some individuals outgrow them over time, but many suffer from lifelong allergies, especially to tree nuts and peanuts. 

Consuming tree nuts or peanuts may activate an individual's immune system response. The key allergen in both tree nuts and peanuts is the protein: Ara h 2. Once ingested, the immune system will view these proteins as harmful and produce antibodies to combat these invaders. Unfortunately, these antibodies cause a chemical known as histamine to be released, triggering an allergic reaction. 

When should I order a Tree Nut & Peanut Allergy IgE Blood Test?

Individuals may order this test panel if they have experienced symptoms associated with a tree nut or peanut allergy. An allergic reaction to tree nuts or peanuts may range from mild to severe, depending on the individual. An individual may experience allergic reactions minutes to a few hours after exposure. An individual allergic to tree nuts or peanuts may experience the following symptoms:

• Tingling sensation in or around the mouth
• Swelling 
• Abdominal pain
• Nausea or vomiting
• Diarrhea
• Itching, hives, or eczema
• Congestion
• Trouble breathing or wheezing
• Lightheadedness

A severe, possibly life-threatening allergic reaction known as anaphylaxis may occur in some cases. An anaphylactic response requires immediate medical attention. Signs or symptoms of anaphylaxis may include:

• Rapid or increased pulse
• Swollen throat or lump, making it difficult to breathe
• Low blood pressure
• Extreme dizziness or loss of consciousness

What foods should I avoid if I have a tree nut or peanut allergy?

Individuals allergic to tree nuts or peanuts should avoid consuming the following foods:

• African, Asian, Mediterranean, and other cuisines
• Baked goods (cakes, cookies, pies, and bread)
• Candy and other sweets (frozen desserts)
• Cereals 
• Certain pre-packaged salads 
• Certain vegan dishes
• Granolas, energy bars, and trail mixes
• Nut butters and oils
• Salad dressings, sauces, and marinades
• Soups, stews, and chilis