Eosinophils are a type of immune cell that are released during infections, allergic reactions, and asthma.
Reviewed: April 22, 2014
Eosinophils are a specific type of white blood cell. Eosinophils become active with certain allergic diseases, infections, and other medical conditions.
Eosinophils are measured as a percentage. The normal range for eosinophils is 0-3%.
Fasting is not required before the test
What the results mean
A high number of eosinophils is often linked to allergic diseases and infections. A high eosinophil count may be due to rheumatoid arthritis, ulcerative colitis, lupus, and leukemia.
A lower than normal eosinophil count may be due to shock and trauma. A lower than normal eosinophil count may be seen with severe infection and Cushing's disease.