asthma

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Related to Allergic Asthma: allergic rhinitis

asthma

(ăz`mə, ăs`–), chronic inflammatory respiratory disease characterized by periodic attacks of wheezing, shortness of breath, and a tight feeling in the chest. A cough producing sticky mucus is symptomatic. The symptoms often appear to be caused by the body's reaction to a trigger such as an allergen (commonly pollen, house dust, animal dander: see allergyallergy,
hypersensitive reaction of the body tissues of certain individuals to certain substances that, in similar amounts and circumstances, are innocuous to other persons. Allergens, or allergy-causing substances, can be airborne substances (e.g.
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), certain drugs, an irritant (such as cigarette smoke or workplace chemicals), exercise, or emotional stress. These triggers can cause the asthmatic's lungslungs,
elastic organs used for breathing in vertebrate animals, excluding most fish, which use gills, and a few amphibian species that respire through the skin. The word is sometimes applied to the respiratory apparatus of lower animals.
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 to release chemicals that create inflammation of the bronchial lining, constriction, and bronchial spasms. If the effect on the bronchi becomes severe enough to impede exhalation, carbon dioxide can build up in the lungs and lead to unconsciousness and death. Following a steady 30-year decline, asthma deaths in the United States, especially among poor, inner-city blacks and among the elderly, began to rise from the late 1970s through the early 1990s. At the same time, the incidence of asthma also increased, both nationally and worldwide.

There is no cure for asthma. Although the disease may go through a period of quiescence, it appears that childhood asthmatics do not outgrow the disease as previously believed. Treatment includes inhaled or oral steroids or bronchodilators (albuterol, theophylline), breathing exercises, and, if possible, the identification and avoidance of triggers.

asthma

[′az·mə]
(medicine)
A pulmonary disease marked by labored breathing, wheezing, and coughing; cause may be emotional stress, chemical irritation, or exposure to an allergen.

asthma

a respiratory disorder, often of allergic origin, characterized by difficulty in breathing, wheezing, and a sense of constriction in the chest
References in periodicals archive ?
2] exposure enhanced symptoms of allergic asthma to OVA sensitization and challenge, we measured the levels of the type 2 and type 1 cytokines.
Efect of omalizumab treatment on peripheral eosinophil and T-lymphocyte function in patients with allergic asthma.
Coverage of the Allergic Asthma pipeline on the basis of target, MoA, route of administration and molecule type
Coverage of the Allergic Asthma pipeline on the basis of route of administration and molecule type.
Professor Brett Finlay of the University of British Columbia, said: "It has long been suspected kids exposed to antibiotics are more prone to allergic asthma.
Scientists believe the drugs disrupt bacteria in a child's gut, harming their immune system and raising the likelihood of them developing allergic asthma.
In this issue, we respond to your questions about the causes of and treatments for allergies and allergic asthma.
The medicine, which could be used for up to 300 children in the UK, is injected into the skin to control severe allergic asthma which has not responded to conventional treatments.
Allergic asthma and chronic bronchitis are two common inflammatory conditions that affect the lower airways of cats.
There are several types of asthma, with exercise-induced and allergic asthma the most common.
Omalizumab was evaluated in a pivotal 52-week study of 627 children aged 6-11 years with moderate to severe persistent, inadequately controlled allergic asthma, despite treatment with fluticasone at a dose of 200 mcg or more per day (or the equivalent), with or without other controller medications, which included short-acting beta-agonists (a mean of 2,8 puffs/day) and leukotriene antagonists (37%).
A randomised controlled study of purified air administered to the 'breathing zone' at night to people with allergic asthma found that active treatment over 10 weeks resulted in improved health-related quality of life compared with placebo.