Eosinophils are a kind of white blood cell that helps fight disease.
The count may range a bit between different laboratories, but a normal range is usually between 30 and 350 cells/µL or 0.02 - 0.35 10⁹/L. A count of more than 500 cells per microliter (cells/µL) of blood is considered eosinophilia.
Mild to moderate and marked or severe eosinophilia are defined as 5% to 15% (0.7 to 5 10⁹/L) and greater than 20% (5 x 10⁹ cells/L) of circulating granulocytes, respectively.
What causes eosinophilia?
- Allergies and asthma.
- Drug allergy.
- Infections (mostly from parasites)
- Blood disorders and cancers.
- Autoimmune disease.
- Endocrine disorders.
- Diseases involving organs and systems, including the: Skin. Lungs. Gastrointestinal system. Neurological system. Joints, muscles and connective tissue. Heart.