Conditions producing allergic reactions and resulting eosinophilia are:Drugs: Iodides, Aspirin, Sulfonamides, Nitrofurantoin, Penicillins, Cephalosporins. Disease conditions: Hay fever, Asthma, Eczema, Serum sickness, Allergic vasculitis, Pemphigus, All types of parasitic infections. Collagen vascular diseases: RA, Eosinophilic fasciitis, Allergic angiitis, Polyarteritis nodosa. Malignancy: Hodgkin’s disease, Mycosis fungoides, CML, Carcinoma of stomach, ovary, lung, Pancreas and uterus. Other diseases: Job’s syndrome, Sarcoidosis, Skin disease. Viral infection like HIV and human T-cell Iymphotropic virus (HTLV-l).