Eosinophilia Definition & Overview

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Eosinophilia Guide

Christine Jeffries

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Definition

Eosinophilia is the formation and accumulation of an abnormally high number of eosinophils (a type of white blood cell) in the blood or body tissues. Eosinophils are created in the bone marrow and are found in the bloodstream and the gut lining. They contain proteins that help the body fight infection from parasitic organisms, such as worms.

In certain diseases, however, these proteins can damage the body. Eosinophilia only indicates an increase in the number of eosinophils. Eosinophilic pneumonia is pneumonia caused by a high number of eosinophils in the lungs, usually instead of an infection. Loffler’s pneumonia is one type of eosinophilic pneumonia. It is a temporary infiltration of eosinophils into the lungs. This condition clears up on its own, over the course of about one month.

White Blood Cells

White Blood Cells
© 2009 Nucleus Medical Art, Inc.

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