Role of eosinophils in allergic manifestations

Eosinophilia is not an uncommon finding in clinical practice andwhen found in association with other signs and symptoms, can serve as a very useful clue for differential diagnosis. Various underlying disorders and etiologies may cause eosinophilia. Common causes of eosinophilia include helminthic infections, atopic and allergic diseases and adverse drug reaction. This is a brief overview of the causes, practical approach to the diagnosis and treatment of patients with eosinophila.