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Delayed hypersensitivity reactions |
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Delayed hypersensitivity reactions Allergic reactions mediated by T cells that occur hours to days after exposure. Mentioned in: Allergies How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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We conducted a prospective study of 60 patients in a tertiary care referral center to ascertain the status of cell-mediated immunity as determined by delayed hypersensitivity reactions in patients with nasopharyngeal carcinoma (NPC) or allergic rhinitis. Non-IgE-mediated inflammatory responses to food antigens that are driven by T cells and other immune cell types have been implicated in delayed hypersensitivity reactions affecting both babies and adults (1,4). The immunopathogenesis of food allergies may be governed by more than one immunologic mechanism, including immediate manifestations mediated by IgE; inflammatory reactions caused by immune complexes, lectins, and superantigens; and delayed hypersensitivity reactions associated with specific T lymphocytes (Helm and Burks 2000). |
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