News tagged with allergy

Related topics: children · infectious diseases · immune system · vaccine · asthma

Video: Why are people allergic to peanuts?

For 1 to 2 percent of the global population, eating a peanut butter and jelly sandwich could be potentially fatal. What makes peanut allergies so lethal, and why is the number of peanut-allergy sufferers on the rise?

Mar 22, 2016
popularity8 comments 0

Many school children avoid basic foods unnecessarily

A study on hypersensitivity to the basic foods milk, egg, fish and wheat among young school children showed that reported food hypersensitivity was eight times more common than allergies confirmed by allergy tests. This according ...

Feb 17, 2016
popularity12 comments 0

Migration clue to nut allergy

Australian-born children with Asian mothers have higher rates of nut allergy than Asian-born children who migrate to Australia, new research has found.

Feb 17, 2016
popularity31 comments 0

Allergy

Allergy is a disorder of the immune system often also referred to as atopy. Allergic reactions occur to normally harmless environmental substances known as allergens; these reactions are acquired, predictable, and rapid. Strictly, allergy is one of four forms of hypersensitivity and is called type I (or immediate) hypersensitivity. It is characterized by excessive activation of certain white blood cells called mast cells and basophils by a type of antibody known as IgE, resulting in an extreme inflammatory response. Common allergic reactions include eczema, hives, hay fever, asthma, food allergies, and reactions to the venom of stinging insects such as wasps and bees.

Mild allergies like hay fever are highly prevalent in the human population and cause symptoms such as allergic conjunctivitis, itchiness, and runny nose. Allergies can play a major role in conditions such as asthma. In some people, severe allergies to environmental or dietary allergens or to medication may result in life-threatening anaphylactic reactions and potentially death.

A variety of tests now exist to diagnose allergic conditions; these include testing the skin for responses to known allergens or analyzing the blood for the presence and levels of allergen-specific IgE. Treatments for allergies include allergen avoidance, use of anti-histamines, steroids or other oral medications, immunotherapy to desensitize the response to allergen, and targeted therapy.

This text uses material from Wikipedia, licensed under CC BY-SA

Subscribe to rss feed