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Hypersensitivity Reactions

Hypersensitivity Reactions - Hypersensitivity Reactions...

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Hypersensitivity Reactions Certain human disorders are attributed to activity of the immune system. These disorders are  commonly known as hypersensitivities, states of increased immune sensitivity that are mediated by  antibody or cellular factors. The disorders may also involve immunodeficiencies in which failures of  antibody-mediated or cell-mediated immunity take place. Normally the immune system plays an important role in protecting the body from microorganisms  and other foreign substances. If the activity of the immune system is excessive or overreactive, a  hypersensitivity reaction  develops. The consequences of a hypersensitivity reaction may be injury  to the body or death.  Most injury resulting from hypersensitivities develops after an interaction has taken place between  antigens and antibodies or between antigens and sensitized T-lymphocytes. The general nature of 
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  • Fall '07
  • immediate hypersensitivity reactions, hypersensitivity reactions, hypersensitivity reaction, immune¬†system.

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