Learn about the Absolute Eosinophil Count (AEC) test, its purpose, normal ranges, and how results are interpreted. Find out when high or low eosinophil levels may indicate health conditions like allergies, infections, or autoimmune disorders. Learn about the eosinophils normal range, what high or low eosinophil counts mean, their causes, symptoms, and how a CBC test helps detect immune or allergy issues early. Eosinophilia , characterized by an elevated level of eosinophils in the blood, can indicate various underlying health conditions. The Absolute Eosinophil Count (AEC) is a crucial parameter for measuring eosinophil levels. Accurate diagnosis and effective management of potential health concerns depend on understanding the consequences of a high AEC. Absolute eosinophil count is a blood test that measures one type of blood cell called eosinophils . Eosinophiluria is defined when urinary eosinophils are >1% as eosinophils .