Changes

==Introduction==

==Introduction==

* Also known as IgE-mediated or anaphylactic hypersensitivity.

* Also known as [[Immunoglobulin E - WikiBlood|IgE]]-mediated or anaphylactic hypersensitivity.

* Ranges from mild cases, such as hayfever, to life-threatening reactions, such as bee-stings.  

* Ranges from mild cases, such as hayfever, to life-threatening reactions, such as bee-stings.  

* Antigens that induce a type I reaction are known as allergens.

* Antigens that induce a type I reaction are known as allergens.

* Generally affects face, eyes, nose and feet

* Generally affects face, eyes, nose and feet

* IgE has a high affinity to IgE receptors on mast cells and basophils, and so binds these receptors.

* [[Immunoglobulin E - WikiBlood|IgE]] has a high affinity to IgE receptors on mast cells and basophils, and so binds these receptors.

 

==Common allergens which elict a type I hypersensitivity reaction:==

==Common allergens which elict a type I hypersensitivity reaction:==