The Absolute Eosinophil Count (AEC) is a medical test that measures the number of eosinophils, a type of white blood cell, in a person’s bloodstream. Eosinophils are part of the immune system and play a role in responding to allergies, parasitic infections, and certain inflammatory conditions. An elevated AEC may indicate allergies, asthma, parasitic infections, or autoimmune diseases. Conversely, a low AEC is less common but could be seen in conditions such as bone marrow disorders. The AEC, along with other white blood cell counts, helps healthcare professionals diagnose and monitor various health conditions, allowing for more accurate treatment and management strategies.