Eosinophilia is a blood disorder
characterized by an abnormally high number of eosinophils in the blood. Eosinophils, which destroy cancer cells and parasites as well as aid in allergic responses, are manufactured in the bone marrow. When a foreign substance is detected within the body, eosinophil production is increased. While eosinophilia is not a disease in and of itself, a high number of eosinophils indicates the presence of abnormal cells, parasites, or allergens.
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