NATS 1670 Lecture Notes - House Dust Mite, Respiratory Tract, Mast Cell
25 Mar 2014
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Document Summary
Allergic reactions are the evil part of the immune system. Your immune system is usually working well if it is in some sort of balance between infection and immunity. If infection is working stronger than immunity, this can result in an allergic reaction: allergies are abnormal sensitivities to antigens in the environment, allergens are antigens that cause allergies. They can cause allergic reactions in some people. The allergic reaction of these takes place in a very unique time of the year. Tissue contact with allergen (antigen) b cells produce ige against allergen ige attaches to mast cells. Allergens complex with ige on mast cells mast cells release histamine and other chemical . Clinical signs of localized allergic reactions: the hypersensitivity reactions are usually mild and localized, site of the reaction depends on the portal of entry, inhaled allergens may cause hay fever, an upper respiratory tract response.
