Allergy test

Allergy testing can help confirm/rule out allergies and consequently reduce adverse reactions and limit unnecessary avoidance and medications.^[1][2] Correct allergy diagnosis, counseling and avoidance advice based on valid allergy test results is of utmost importance and will help reduce the incidence of symptoms, medications and improve quality of life.^[3] A healthcare provider can use the test results to identify the specific allergic triggers that may be contributing to the symptoms. Using this information, along with a physical examination and case history, the doctor can diagnose the cause of the symptoms and tailor treatments that will help the patient feel better. A negative result can help the doctor rule out allergies in order to consider other possible. Ruling out allergies is as important as confirming them to limit unnecessary avoidance, worry and negative social impact.^[4]

NIH guidelines for the diagnosis and management of food allergy and the diagnosis and management of asthma recommend either allergy blood testing or skin prick testing to reliably determine allergic sensitization.^[5][6] Both tests are very accurate, and have similar diagnostic value in terms of sensitivity and specificity^[7][8]

For an allergy blood test, a sample of the patient’s blood is sent to a laboratory for analysis. The doctor looks at the test results to help determine if the patient has allergies. For babies and young children, a single needle stick for allergy blood testing is often more gentle than several skin tests.

For a skin prick test, a patient is pricked with a series of needles that contain extracts of allergic triggers. The doctor looks for strong reactions like welts or red bumps to determine if the patient has allergies.

References

External links

Product information from the manufacturer of ImmunoCAP allergy blood test:

• www.phadia.com
• www.isitallergy.com