The Absolute Eosinophil Count (AEC) test is a blood test that measures the number of eosinophils in the blood. Eosinophils are a type of white blood cell that play a role in the body’s immune response to parasites and allergens. The AEC test is often used to diagnose and monitor allergic reactions, asthma, and certain types of parasitic infections. A high AEC count may indicate an allergic reaction or parasitic infection, while a low AEC count may indicate a viral or bacterial infection. The test involves taking a small sample of blood, which is then analyzed in a laboratory to determine the number of eosinophils present. The AEC test is a simple and non-invasive way to evaluate immune system function and monitor the progression of certain conditions. Depending on the results of the test, doctors may recommend additional diagnostic tests or treatments to address underlying conditions.