Allergy (hypersensitivity reaction)

Posted: Feb 05, 2011 |Comments: 0 |

In some people the immune system goes haywire. Instead of fighting only harmful pathogens, the immune system crashes on innocent strangers, such as pollen, house dust or certain food components: the body is allergic.

The tendency to allergic reactions may be innate. Therefore develop people whose parents are allergic, significantly more often an equally hypersensitive immune system than those in which no allergy occurs in the family.

Allergic diseases in Western industrialized nations is very common (for example, 16 percent of Germans suffer from hay fever) is growing, and the tendency. Why are allergies increasing in industrialized countries is unknown. Potentially very hygienic living conditions favor the development of allergies in children. Because in regions with simple hygienic standards hypersensitivity reactions occur much less frequently. Presumably, dirt and germs harmless strengthen the immune system in childhood and less prone to take for allergies.

Immediate type of allergy, anaphylactic reaction

Rapid and often violent reactions in the immediate type.

About 90 percent of all allergies are allergies of the immediate type. The symptoms occur immediately after contact with the allergen. Typical allergic diseases are:

Except in the brain mast cells throughout the body. If you are switching the allergic reaction. Particularly strong reactions are to be expected from atopic patients who have a genetic predisposition to increased IgE production during contact with an allergen. The interfaces for the the mast cells, allergic reaction. Mast cells are specialized white blood cells. Mast cells are found in the loose connective tissue of all organs, including on the skin and blood vessels. Not only in the brain mast cells are present. In the mast cells are small bubbles with so-called mediators, especially histamine, are filled.

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