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Eosinophil Levels

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Eosinophils make up between 1 to 4% of the total white blood cell count in our blood. When their levels are measured in the blood, they can be a good indicator of underlying medical problems such as allergies. They are one of the multitude of cells released by the immune system into the circulatory system to help fight off invasive cells or allergens the body finds to be threatening. Increased levels will suggest the body is fighting off what it deems to be a foreign substance or allergen. This can be anything from foods and medications to hay fever or parasitic infections. Vascular disease also causes a rise in the level of eosinophils. A decreased or low level of eosinophils can suggest the intake of steroids into the body.