News tagged with allergic reactions

Related topics: asthma

Immune cells commit suicide to prevent allergy

Scientists from the CNRS, INSERM and Université de Limoges, working in the Laboratoire Contrôle de la Réponse Immune B et Lymphoproliférations (CNRS/Université de Limoges) have demonstrated that the ...

Feb 13, 2015
popularity 5 / 5 (2) | comments 0

State-of-the-science help for hay fever sufferers

Sublingual immunotherapy is one of several state-of-the-science treatments for allergic rhinitis, or "hay fever," being recommended by a panel of experts in a new guideline published Feb. 2, 2015, by the American Academy ...

Feb 02, 2015
popularity not rated yet | comments 0

Estrogen worsens allergic reactions in mice

Estradiol, a type of estrogen, enhances the levels and activity in mice of an enzyme that drives life-threatening allergic reactions, according to researchers from the National Institute of Allergy and Infectious ...

Dec 29, 2014
popularity 5 / 5 (3) | 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