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Chapter 18 - Hypersensitivities Any immune response against...

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Hypersensitivities Any immune response against a foreign antigen that is exaggerated beyond the norm Four types Type I (immediate) Type II (cytotoxic) Type III (immune-complex mediated) Type IV (delayed or cell-mediated)
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Hypersensitivities Type I (Immediate) Hypersensitivity Localized or systemic reaction that results from the release of inflammatory molecules in response to an antigen Develops within seconds or minutes following exposure to an antigen Commonly called allergy, and the antigens that stimulate it are called allergens
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[INSERT FIGURE 18.1a]
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