What Causes Eosinophilia?

Eosinophilia is a somewhat common condition that occurs when there are more eosinophils in an individual's system than there should be. Eosinophils are a kind of white blood cell designed to fight diseases. When this condition develops within the body, it's typically an indicator the patient is suffering from cancer, a parasitic infection, or an allergic reaction. The high amounts of eosinophils could exist within the blood or tissues surrounding the inflammation or infection the patient is suffering from. The tissue version of eosinophilia is commonly detected by taking a look at certain fluids in the body such as mucus.