Blood health

Inflammation

Eosinophils - EOS (EO)

What it measures

Complete Blood Count Test (CBC)

Clinical significance

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.

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