Prevalence Of Asthma

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What is asthma? In many people, asthma appears to be an allergic reaction to substances commonly breathed in through the air, such as animal dander, pollen, or dust mite and cockroach waste products. The catch-all name for these substances, allergens, refers to anything that provokes an allergic reaction. Some people have a genetic predisposition to react to certain allergens.

When these people breathe in the allergen, the immune system goes into high gear as if fighting off a harmful parasite. The system produces a molecule called immunoglobulin E (IgE), one of a class of defensive molecules termed antibodies. The IgE antibody is central to the allergic reaction. For example, it causes mast cells, a type of specialized defensive cell, to release chemical 'weapons' into the airways. The airways then become inflamed and constricted, leading to coughing, wheezing, and difficulty breathing -- an asthma attack.

Without treatment, such as inhaled corticosteriods to reduce the inflammation, asthma attacks can be deadly. The overall death rate for asthma, however, is low. - NIAID

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Prevalence Of Asthma

Asthma in preschool children: prevalence and risk factors
Asthma in preschool children: prevalence and risk factorsM M Haby, J K Peat, G B Marks, A J Woolcock, S R LeederAbstractBackground—The prevalence of asthma in children has increased in many coun-tries. over recent years.

Asthma
... makes it difficult to accurately compare trends in prevalence of asthma before 1997 with those since. ... standard, the steady rise in the prevalence of asthma constitutes an epidemic ...

Prevalence of asthma treated in general practice
British Thoracic Society0171 831 8778Supported by:Factsheet 99/1Lung & Asthma Information Agency, Dept of Public Health Sciences, St. George's Hospital Medical School, Cranmer Terrace, London SW17 ORE. ... British Lung Foundation0171 831 5831Prevalence of asthmatreated in general practiceIntroductionThe ... This factsheet presents information on the. prevalence of treated asthma in GPRD ...

Asthma References
... Is the prevalence of asthma changing? Arch Dis Child 1989;64:172-175 ... Lindholm H, Björkstén F, Koskenvuo K, Laitinen LA. Prevalence of asthma in Finnish young men ...

Asthma Epidemiology
... The prevalence of asthma has been reported to be increasing worldwide, but this apparent trend continues to be ... the same population the prevalence of asthma can vary to a significant ...

DOE Document - On air quality and prevalence of asthma
Short communication. On air quality and prevalence of asthma. -

AIRE | Executive Summary | Asthma Prevalence in Europe
Asthma Prevalence in Europe. The national patient survey for Asthma Insights & Reality in Europe was constructed by screening a national probability sample of telephone households in each of the seven AIRE countries. ... countries in the prevalence of asthma is consistent with the findings of the European ...

Chapter 8: Asthma
... There is a high prevalence of asthma symptoms in New Zealand compared withother developed countries, and there is some evidence that the prevalence of asthma. is increasing. ...

Asthma in San Francisco
... in San FranciscoBackground: The prevalence of asthma, the proportion of people with the ... with diagnosed asthma will likely underestimate the prevalence of asthma. In the United ...

EPIDEMIOLOGY OF ASTHMA AND ALLERGY
EPIDEMIOLOGY OF ASTHMA AND ALLERGY. Descriptive epidemiology of asthma. Incidence and prevalence in Australia. A number of studies offer information on current incidence and secular trends for asthma. ... of birthplaces noted the (age-sex adjusted) prevalence of asthma was highest in those born ...

Depression in Asthma: Prevalence and Clinical Implications
Depression in Asthma: Prevalence and Clinical Implications Background: Asthma and depression are both common illnesses. Data suggest that the prevalence of asthma and asthma-related morbidity and ...

Asthma Prevalence and Incidence
Allergy, Asthma & Immunology is an information and news service for patients, parents of patients, purchasers of group health programs, the news media, and others interested in the allergic ... rhinitis demonstrates that the cumulative prevalence of asthma continues to increase with age, and ... up study, the cumulative prevalence of asthma increased to nearly 6 percent ...

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