News tagged with allergic reactions

Related topics: asthma

Emergency supplies of epinephrine in schools save lives

Millions of children across the country need emergency epinephrine at school because they could suffer a severe, potentially life-threatening allergic reaction (anaphylaxis) to food or an insect sting. As schools across the ...

Nov 07, 2014
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Key step in allergic reactions revealed

By studying the mode of action of the interleukin-33 protein, an alarmin for white blood cells, a team at the Institut de Pharmacologie et de Biologie Structurale (IPBS - CNRS/Université Toulouse III - Paul ...

Oct 14, 2014
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Moisturising newborns prevents allergies: Japan study

Applying moisturiser to a newborn baby's skin could help prevent eczema and even food allergies in later life, possibly offering a cheap and easy way to combat a growing global problem, a Japanese institute said Friday.

Oct 03, 2014
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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