The absolute eosinophil count is a blood test that measures the number of eosinophils, a type of white blood cell, in a sample of blood. Eosinophils are part of the body's immune system and play a role in fighting parasitic infections and allergic reactions. The normal range for absolute eosinophil count is generally between 30 and 350 eosinophils per microliter (mcL) of blood. However, the normal range can vary depending on factors such as age, sex, and health status. A high absolute eosinophil count may indicate conditions such as allergies, asthma, eczema, parasitic infections, autoimmune diseases, or certain types of cancer. However, it's important to note that a high eosinophil count is not specific to any one condition and further testing may be needed to determine the underlying cause. A low absolute eosinophil count is less common and may be seen in conditions such as sepsis or treatment with certain medications. It's important to note that the interpretation of absolute eosinophil count results should be done by a qualified medical professional.