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Onion Allergy IgE Blood Test

The onion allergy IgE blood test measures the amount of allergen-specific IgE antibodies in the blood to detect an allergy to onions.


Test Code: 602723

Also Known As:

Methodology: Thermo Fisher ImmunoCAP®

Preparation: No special preparation required.

Test Results: 3-5 days. May take longer based on weather, holiday or lab delays.


Test Code: 2848

Also Known As:

Methodology: Immunoassay (IA)

Preparation: No special preparation required.

Test Results: 3-5 days. May take longer based on weather, holiday or lab delays.

Description

Order an onion allergy IgE blood test to detect an allergy to onions. This test measures the amount of allergen-specific antibodies in a blood sample.

Onions are a common addition to a wide variety of cooked dishes and cold recipes, making it difficult for an allergic individual to avoid them. Some individuals react from touching, eating, or smelling onion in the raw form. Others encounter symptoms from both cooked and raw onions.

Onions are part of a large group of vegetables known as the allium family. Since onions are regularly used in flavoring, preserving, and cooking different types of foods, allergic individuals should pay close attention to foods that contain not only onions but also include members of the allium family. Some food that can cause onion allergy symptoms include:

  • Leeks
  • Chives
  • Shallots
  • Scallions
  • Broth/stock
  • Garlic or gardener's garlic
  • Pre-made sauces and soups
  • Onion juice
  • Onion powder
  • Garlic powder
  • Flavored cheese, particularly Mexican cheese
  • Frozen turkey and chicken
  • Most canned or processed meat, unless specified otherwise
  • Pre-made pizza crusts
  • Saltine crackers

An allergy to onions triggers a reaction in an individual's immune system. The body views certain substances as toxic and produces IgE antibodies to these contaminants. These antibodies cause histamine to be released, which will cause the symptoms of an allergic reaction.

Allergy symptoms vary from one individual to the next ranging from mild to severe reactions, which can be experienced within minutes to a few hours after exposure. Common symptoms of an onion allergy may include one or more of the following symptoms:

  • Hives or rash
  • Itching
  • Headache
  • Coughing or wheezing
  • Nausea
  • Diarrhea
  • Vomiting
  • Stomach pain
  • Swelling of the face, lips, or throat
  • Tingling sensation in the mouth
  • Trouble breathing
  • Fainting or dizziness
  • Anaphylaxis, although extremely rare

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