Allergy and Asthma Resources

Allergy in Wikipedia
Allergy is a disorder of the immune system often also referred to as atopy. Allergic reactions occur to 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.
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Asthma in Wikipedia
Asthma is a chronic condition (generally associated with humans but also controversially being diagnosed in housepets such as cats[1]) involving the respiratory system in which the airway occasionally constricts, becomes inflamed, and is lined with excessive amounts of mucus, often in response to one or more triggers.[2] These episodes may be triggered by such things as exposure to an environmental stimulant (or allergen) such as cold air, warm air, perfume,[3] moist air, exercise or exertion, or emotional stress. In children, the most common triggers are viral illnesses such as those that cause the common cold.[4] This airway narrowing causes symptoms such as wheezing, shortness of breath, chest tightness, and coughing. The airway constriction responds to bronchodilators. Between episodes, most patients feel well but can have mild symptoms and they may remain short of breath after exercise for longer periods of time than the unaffected individual. The symptoms of asthma, which can range from mild to life threatening, can usually be controlled with a combination of drugs and environmental changes.
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Other Resources:
Allergy in MSN Encarta
Asthma in MSN Encarta
Allergy and Asthma FAQ’s
National Institute of Allergy and Infectious Disease
Asthma Publications