Eosinophilia (eosinophil count >0.45 × 109/litre) is associated with some infections, some allergic diseases, and a variety of other conditions, often neoplastic.
Parasitic diseases—eosinophilia is a characteristic feature of infection by multicellular helminth parasites, e.g. Strongyloides stercoralis, with diagnosis typically based on geographical/dietary history and examination of stool for ova and larvae....