An allergic reaction occurs when the body mounts an immunologic response to a foreign substance. The reactions of the immune system are divided into two major types: immediate hypersensitivity mediated by immunoglobulins, and delayed hypersensitivity mediated by sensitized lymphocytes (Fig. 10-1). Both of these mechanisms are important in allergic skin diseases.
KeywordsCorticosteroid Tuberculosis Tetracycline Candida Endocarditis
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