Last updated on January 27th, 2023 at 12:26 pm
Allergy testing has advanced to determine the specific causes of allergies, so you can treat your allergies. Find out what allergies are affecting you. Take our allergy and Sensitivity Blood Test to find out what you’re sensitive to.
What is the Allergy Test?
Quick Jump Table
A blood test for allergies and allergy symptoms measures the body’s immune response to substances that most people are exposed to everyday. Get a blood test for allergens and allergens symptoms: high sensitivity levels for airborne allergens, food allergens, and environmental allergens.
Blood Testing for Allergies
An allergic reaction occurs when an allergen-specific antibody called immunoglobulin E (IgE), which is produced by the immune system and binds to cells in the body (mast cells), comes into contact with the specific allergen for which it was produced. Get the IgE Test Done, Here.
Allergens cause the immune system, specifically white blood cells, to produce IgE antibodies that attach themselves to mast cells or basophils. The allergen attaches to specific IgE antibodies on the surface of the mast cell, and when the allergen and the IgE antibodies combine, the release of histamine (the substance that dilates blood vessels) and other chemicals is triggered, causing allergy symptoms.
What are the Common Allergy Symptoms?
- Eczema (atopic dermatitis, contact dermatitis)
- Hives (urticaria) and or swelling (angioedema)
- Itchy, watery eyes (allergic conjunctivitis)
- A runny nose, sneezing
- Shortness of breath, chest tightness, wheezing
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Allergists/immunologists are physicians specially trained to diagnose and treat allergies. If an allergy is suspected, the physician may ask the patient to keep a record of when, where, and under what circumstances the symptoms occur. To help diagnose an allergy, the allergist/immunologist takes a medical and family history (allergies often run in families) and performs a physical examination and diagnostic tests. A medical history includes information about symptoms (e.g., where and when they occur) and information about the patient’s home, work, and school environment.
During the physical examination, the allergist/immunologist examines the ears, eyes, nose, throat, skin, and lungs. Sometimes, a pulmonary function test is performed to determine how well the patient can expel air from the lungs.
What are the Three Main Types of Allergy Testing?
Do you suffer from allergies? Find out for sure through a safe blood test for allergic diseases.
Skin tests often are used to diagnose allergies. These tests involve minor discomfort and take about 30 minutes to perform. An allergist/immunologist interprets the results of the test with the patient’s history and uses these results to determine the best course of treatment. Treatment may include medications and allergy shots (immunotherapy).
Prior to allergy skin tests, a positive histamine control test and a negative saline control test may be performed. A positive control test is used to determine if the patient reacts to histamine. If the patient does not immediately react to histamine, the results of allergy skin tests can be difficult to interpret. A negative control test involves applying a saline solution that does not include any allergens. Patients who react to this solution may have skin that is too sensitive to allow correct interpretation of allergy skin tests.
There are two types of skin tests: prick tests and intradermal (i.e., under the skin) tests. Prick tests involve placing small drops of common allergens on the skin (usually on the forearms or back) and then lightly pricking the skin through the drop with a small needle. Intradermal tests involve injecting a small amount of allergen into the outer layer of skin. When a patient is allergic to a substance, redness, itching, and swelling develop at the site of the test within 20 minutes. After the test, a mild cortisone cream may reduce itching.
Patch tests can diagnose contact dermatitis. In this test, the allergist/immunologist places a small amount of allergen on the skin (usually on the back), covers the area with a bandage, and checks for a reaction after 48–72 hours. Patients who are allergic to the substance develop a rash, or even blisters, on the skin.
Certain medications (e.g., antihistamines, antidepressants) and skin conditions (e.g., eczema) can interfere with allergy skin tests. Patients who must continue to take these medications and patients who have a severe skin condition may require a blood test to diagnose allergies.
Allergy Blood Tests
Allergy blood tests involve taking a blood sample, adding an allergen to the sample, and measuring the amount of immunoglobulin E (IgE) antibodies produced in response to the allergen. Types of allergy blood tests include the following. Before proceeding, Visit blog.
- Enzyme-linked immunosorbent assay (ELISA)
- In vitro basophil histamine release assay
- The radioallergosorbent test (RAST)
- Immuno EIA
Allergy blood tests, which are less sensitive and more expensive than skin tests, are usually reserved for rare cases when allergy skin tests may not be accurate (e.g., when the patient has sensitive skin that reacts to a saline prick test or has a skin condition, such as hives or eczema, that prevents an adequate field for skin tests).
healthcare nt sickcare, we offer various tests categories in their complete allergy package;
- Veg Food Allergies
- Non-Veg Food Allergies
- Drug Allergies
- Contact Allergies
- Inhalant Allergies
Besides allergy skin tests and allergy blood tests, patients with a suspected food allergy may undergo food allergy tests. Food allergy testing often begins with keeping a food diary, which is a detailed list of all foods, the date and time they were eaten, and any symptoms that occurred. When a single food allergy is suspected, the patient may be advised to eliminate the food from the diet and then, if symptoms are relieved, add the food back to the diet to determine if an allergic reaction occurs. This allergy test is not used in patients with a history of a severe allergic reaction (anaphylaxis).
If the results are inconclusive, the allergist/immunologist may perform a “blinded” food allergy test and/or a challenge test. These tests usually are performed in a physician’s office or in the hospital, and they are closely supervised.
They involve feeding the patient either the suspected food, or a neutral food (called a placebo), and then monitoring the patient for an allergic reaction. Neither the patient nor the physician knows whether the suspected food or the placebo is being given to the patient. The results are very reliable.
Have you ever used a new type of skin care product or detergent, only to have your skin become red and irritated? If so, you may have experienced contact dermatitis. This condition occurs when chemicals you come into contact with cause a reaction.
Allergic contact dermatitis occurs when the skin develops an allergic reaction after being exposed to a foreign substance. This causes the body to release inflammatory chemicals that can make the skin feel itchy and irritated.
A drug allergy is an allergic reaction to a medication. With an allergic reaction, your immune system, which fights infection and disease, reacts to the drug. This reaction can cause symptoms such as rash, fever, and trouble breathing.
True drug allergy is not common. Less than 5 to 10 percent of negative drug reactions are caused by a genuine drug allergy. The rest are side effects of the drug. All the same, it’s important to know if you have a drug allergy and what to do about it.
Red irritated eyes, constant sneezing, runny nose are common symptoms of inhalant allergies. Typical inhalant allergens are pollens from grasses, trees and weeds, mold spores, pet dander, and dust mites.
How do I prepare for an allergy blood test?
There are not any special preparations required to under go allergy blood test. Talk to your doctor about this test to so that he can advise if you need to stop any medicine while going for allergy blood test.
Do I need to fast before the allergy blood test?
No. Overnight fasting is not required for undergoing an allergy blood test.
Does allergy blood test include any skin test?
No. Allergy blood test does not include any skin prick test. Give blood specimen at the laboratory and they will process your blood specimen as per method they follow.
What method used for an allergy blood test?
EIA. Allergy blood tests involve taking a blood sample, adding an allergen to the sample, and measuring the amount of immunoglobulin E (IgE) antibodies produced in response to the allergen.
How many allergens are covered in CAP, complete allergy profile?
Usually there are 200-225 allergens covered in the EIA Method allergy blood test.
When I can expect a report of allergy blood test?
It depends on the laboratory. Normally, most of the laboratories having specimen processing days specific to allergy test. Reporting time varies from 1 day to 6 days.
Allergy Testing in Pune
Allergy blood test in Pune and Pimpri Chinchwad;
- Allergy test in Pune
- Food Allergy Test in Pune
At healthcare nt sickcare, you can choose any of the above allergy testing categories or complete allergy package according to your doctor’s prescription or past allergy medical history. Call +919766060629 or Visit Our FAQ Page.
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