What is eosinophilia?

What is eosinophilia?

Eosinophilia is an unusually high number of eosinophils in your blood (≥ [greater than or equal to] 500 eosinophils per microliter). Eosinophils are one of several white blood cells that support your immune system. They’re part of your body’s defense system against allergens and help protect your body from fungal and parasitic infections. Certain medical conditions and medications can cause high eosinophil counts.