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Monday 5 July 2004

Definition: An eosinophil is a type of white blood cell (leucocytes) that is commonly associated with allergic responses or with parasitism.

The eosinophil has a characteristic appearance under the microscope due to the presence of pink staining granules.

Finding eosinophils in tissue suggests allergic disease usually whereas finding increased eosinophil numbers in a blood sample more commonly suggest parasitism.


- eosinophilic infiltration
- eosinophilic disorders

See also

- eosinophil development
- eosinophil differentiation
- eosinophil progenitors


- Kay AB. The role of eosinophils in the pathogenesis of asthma. Trends Mol Med. 2005 Apr;11(4):148-52. PMID: 15823751