Membrane-bound IgE L Histamine, leukotrienes, Acute Allergic Mast c Interleukin-5 Reaction Wheezy Interleukin-4 Urticaria Sneezing, rhinorrhea unctivitis Allergen Eosinophil IgE production Basic proteins, platelet-activating erleukin-4 Dendrite Th2 Chronic Allergic Further wheezing Histamine-releasing Mast cell lipids Sustained blockage of the nose Eczema MHC class Il T-cell receptor molecule Neurotrophins d