Diagnostic Tests

Allergy Onion Enzyme Assay Skin


Allergy Onion Enzyme Assay Skin

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What is this test?

This test helps to find whether an individual is allergic to onion or not. In this test, a solution containing allergen onion is applied to the skin. Then the applied area of the skin is pricked with a lancet needle.

What is an Onion?

Onion is also known as bulb onion or common onion. It has bluish green leaves and has a bulb-like structure at the base. Onions are cultivated widely around the world for several uses. Onion is a vegetable and usually cooked.

Mostly onions are used to make pickles, chutneys, soups, and for several other food items. Onions are mostly composed of water and carbohydrates. They also contain low levels of essential nutrients and provide flavor to the food. Onions cause a stinging sensation in the eyes and can lead to uncontrollable tears when they are cut.

Eating onions may reduce the risk of heart diseases and reduce high blood pressure. Red onions are rich in antioxidants and may protect against certain cancers and diabetes. They also improve bone mineral density. Onions are also very useful in boosting the immune system and digestive health.

What is Onion allergy?

Onion allergy is a type of allergy in which an individual is allergic to the onion and may suffer from symptoms such as rashes, itching, diarrhea, swelling in the lips, nausea, mouth and gum blisters, burning sensation on the mouth, sore throat, burps, etc.

In severe allergic condition, an individual may suffer from life-threatening anaphylactic shock.

Why this test is performed?

This test is performed to check whether an individual is allergic to onion or not. The doctor may ask you to undergo this test if you are suffering from symptoms such as burning sensation on the mouth, sore throat, burps, rashes, itching, diarrhea, swelling in the lips, nausea, mouth and gum blisters, etc.

Test Preparation

No special preparation is needed for Allergy Onion Enzyme Assay Skin. Inform your doctor if you are on any medications or have any underlying medical conditions or allergies before undergoing Allergy Onion Enzyme Assay Skin. Your doctor depending on your condition will give specific instructions.

Understanding your test results

The test results may be different depending on gender, age, and health conditions. Inform your doctor if you have any other allergies.

Generally, there is no need for medical interventions if test results are normal.

If the test results are negative it may indicate that there is no wheal and flare type reaction. So, the individual is not allergic to onion.

Wheal-and-flare reaction is the swelling and redness of the skin.

In case the test results are positive it may indicate that there is a wheal-and-flare type reaction on the skin. A wheal with a diameter of 3mm or more is generally considered as a positive result which means the individual is allergic to onion.

GenderAge groupsValue
UNISEXAll age groupsA wheal and flare reaction of atleast 3mm indicates that the patient is allergic to the substance
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