Hypersensitivity reactions occur when the immune system overreacts and damages the body. There are two types of reactions: immediate and delayed. There are also several subtypes, including IgE-mediated, cytotoxic, immune complex-mediated, and stimulatory.
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Hypersensitivity Reactions PPT Summary
- Hypersensitivity reactions can be either humoral or cell-mediated.
- There are five types of hypersensitivity reactions: type I (IgE-mediated), type II (antibody-mediated cytotoxic), type III (immune complex-mediated), type IV (delayed type hypersensitivity), and type V (stimulatory type).
- Mast cell degranulation plays a crucial role in type I hypersensitivity reactions.
- Systemic anaphylaxis is a severe and potentially fatal hypersensitivity reaction that occurs within minutes of allergen exposure.
- Hypersensitivity reactions can be detected through skin testing and antibody determination.
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