Allergic diseases, especially hypersensitivity of the atopic type (e.g. bronchial asthma, hay fever, urticaria and food sensitivity)

Parasitic diseases (e.g. amoebiasis, hookworm, ascariasis, tapeworm infestation, filariasis, schistosomiasis and trichinosis)

Recovery from acute infection

Certain skin diseases (e.g. psoriasis, pemphigus and dermatitis herpetiformis, urticaria and angioedema, atopic dermatitis)

Drug sensitivity

Polyarteritis nodosa, vasculitis, serum sickness

Graft-versus-host disease

Hodgkin lymphoma and some other tumors, especially clonal T-cell disorders

Metastatic malignancy with tumour necrosis

Hypereosinophilic syndrome

Chronic eosinophilic leukemia

Myeloproliferative including systemic mastocytosis

Pulmonary syndromes Eosinophilic pneumonia, transient pulmonary infiltrates (Loeffler’s syndrome), Eosinophilic Granulomatosis with Polyangiitis (EGPA) and tropical pulmonary eosinophilia.