Diagnostic tests

Eosinophil blood test

An eosinophil blood test is a diagnostic tool used to measure the number of eosinophils, a type of white blood cell, in a person's blood. Eosinophils are part of the immune system and play a role in fighting infections and allergic reactions. Abnormal levels of eosinophils can be a sign of certain medical conditions, such as allergic reactions, infections, and some blood disorders. A healthcare provider may order an eosinophil blood test to help diagnose these conditions or to monitor the effectiveness of treatment. The test is typically performed by drawing a sample of blood from a vein in the arm.

This page is provided for educational and informational purposes only and does not constitute the provision of medical advice or professional services. The information provided should not be used for diagnosing or treating a health problem or disease, and those seeking personal medical advice regarding any of the tests and conditions referenced above are advised to consult with a licensed clinician. Always seek the advice of your qualified health provider regarding a medical condition and do not disregard professional medical advice or delay in seeking it because of any information on this page. If you think you may have a medical emergency, immediately call 911 or go to the nearest urgent care center or hospital.

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