Allergy

New therapeutic approach for advanced lung disease

Researchers have demonstrated the potential of a new class of drugs for the treatment of refractory chronic obstructive pulmonary disease (COPD). Incurable to date, the disease is one of the most frequent causes of death ...

Jan 15, 2018
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Babies stir up clouds of bio-gunk when they crawl

When babies crawl, their movement across floors, especially carpeted surfaces, kicks up high levels of dirt, skin cells, bacteria, pollen, and fungal spores, a new study has found. The infants inhale a dose of bio bits in ...

Jan 11, 2018
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Five things to know about coughing kids

Parents know the drill. First comes the sniffles, followed by congestion—and then finally, a persistent, hacking cough. And that cough can drag out for weeks, long after the other upper-respiratory symptoms clear up. Why ...

Dec 22, 2017
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Here's how stress may be making you sick

A Michigan State University researcher is providing new insight into how certain types of stress interact with immune cells and can regulate how these cells respond to allergens, ultimately causing physical symptoms and disease.

Jan 10, 2018
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An allergy is a hypersensitivity disorder of the immune system. Allergic reactions occur when a person's immune system reacts to normally harmless substances in the environment. A substance that causes a reaction is called an allergen. These reactions are acquired, predictable, and rapid. Allergy is one of four forms of hypersensitivity and is formally called type I (or immediate) hypersensitivity. Allergic reactions are distinctive because of excessive activation of certain white blood cells called mast cells and basophils by a type of antibody called Immunoglobulin E (IgE). This reaction results in an inflammatory response which can range from uncomfortable to dangerous.

Mild allergies like hay fever are very common in the human population and cause symptoms such as red eyes, itchiness, and runny nose, eczema, hives, hay fever, or an asthma attack. 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 reactions called anaphylaxis. Food allergies, and reactions to the venom of stinging insects such as wasps and bees are often associated with these severe reactions.

A variety of tests exist to diagnose allergic conditions. These include placing possible allergens on the skin and looking for a reaction such as swelling. Blood tests can also be done to look for an allergen-specific IgE.

Treatments for allergies include avoiding known allergens, use of medications such as anti-histamines that specifically prevent allergic reactions, steroids that modify the immune system in general, and medications such as decongestants that reduce the symptoms. Many of these medications are taken by mouth, though epinephrine, which is used to treat anaphylactic reactions, is injected. Immunotherapy uses injected allergens to desensitize the body's response.

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

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