Allergy

Answer

Allergy is a reaction of the immune system to a substance that usually does not cause harm in most people. This reaction can cause symptoms like sneezing, skin rash, or breathing trouble.

Answer

Clemens Von Pirquet, a Viennese pediatrician, introduced the concept of allergy in 1906 after noticing that some patients were hypersensitive to normally harmless substances.

Answer

In Greek, allergy means "other work." This name was given to describe a different kind of body reaction to harmless substances.

Answer

An allergen is a substance that causes an allergy. Common allergens include dust, spores, pollen, insect stings, certain clothes, and food.

Answer

The immune system makes immunoglobulin proteins, also called antibodies, that bind to the allergen and then to white blood cells. This triggers the release of histamine, which causes allergy symptoms.

Answer

Histamine is an inflammatory chemical released during an allergic reaction. It causes symptoms such as inflammation, skin rash, and constriction of the bronchioles.

Answer

Histamine causes the symptoms of allergy. It is responsible for inflammation, skin rash, and narrowing of the bronchioles in asthma.

Answer

Allergens can enter through the skin, mouth, and nose. These are the main routes by which allergic substances affect the body.