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proteins , dust mites, insect poisons, and foods. symptoms may include sneezing, skin rashes, difficulty breathing, itching, watery eyes, and so forth. an allergen is a substance that triggers an allergic reaction. the immune system is the system of specialized cells and organs that protects an organism
hypersensitivity involves the interaction of the antigen (i.e. foreign substance, or allergen when a person is hypersensitized to it) with immunoglobulin e (ige, a subclass of antibodies ). this hypersensitivity is characterized by immediate reaction, in which mast cells and basophils (a type of white blood cell...
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