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Why is Asthma on the Rise?
Although several theories exist about why asthma rates have risen during the last two decades, there probably is no simple answer, says Calman Prussin, M.D., head of the clinical allergy and immunology unit at NIAID.
One theory is that people today, especially in developed countries, are spending more time indoors, Dr. Prussin says. We are therefore exposed to more indoor allergens, such as dust mite allergen, that cause asthma. 'Our houses are now hermetically sealed to save heating and cooling energy,' he notes, 'and unfortunately this causes more indoor allergen exposure.'
Another reason may be that people today live in cleaner, more sanitary conditions than they did before the industrial revolution, relatively free of disease-causing viruses and bacteria, he says. This clean living affects our immune system. The immune system's defensive white blood cells, called T cells, have two basic 'settings,' he explains. Th1 cells fight infectious viruses and bacteria. Th2 cells fight parasites but are also involved in allergic reactions.
'We are exposed to fewer viruses and bacteria than people were 100 years ago, so perhaps our immune systems have not learned to make Th1 cells as well,' Dr. Prussin says. 'That means we have a greater proportion of Th2 cells in our bodies, which might lead to more allergies and asthma.'
Other theories point to increased levels of air pollutants, a decline in the amount of exercise people get, or rising obesity as factors in the increase of asthma. - NIAID
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European Respiratory Society
... William COOKSON (includes PowerPoint Display): Genetics of Asthma. Edwin SILVERMAN (includes PowerPoint Display): ... Genetics of asthma PowerPoint Presentation (3.51Mo) ...
Asthma Powerpoint
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AIRE | Slides | Download
... Download the AIRE survey slides as a PowerPoint presentation. Click here to download the complete set of ... Asthma In Europe: A Landmark Survey. Download. PowerPoint Slide. Presentation ...
PowerPoint Presentation - ASTHMA
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Component 1: Measures of Assessment. and Monitoring. Two aspects: Initial assessment and diagnosis of asthma. Periodic assessment and monitoring. Initial Assessment and. Diagnosis of Asthma. Determine that: ... tightness, or cough. Asthma symptoms vary throughout the day ... examination does not exclude the diagnosis. of asthma ...
The Asthma Management Model System - Slide Show
NHLBI is pleased to be able to offer this slide set for public use. The slides can be downloaded for use in computer slide shows, conventional slide presentations, or for online viewing via the website. ... Download menu: PowerPoint 4 ( 77 Kb) PowerPoint 95 ( 294 Kb) PowerPoint 97 ( 131 Kb) PDF ( 93 Kb) Control of Factors Contributing to Asthma Severity ...
Microsoft PowerPoint - 08 Balmes Asthma
Occupational Asthma: Updates on Diagnosis and TreatmentJohn R. Balmes, MDUCSFDEFINITIONSOCCUPATIONAL ASTHMA = asthma caused by exposure to an agent found in. the workplaceWORK-AGGRAVATED ASTHMA = exacerbation of preexisting asthma by
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Microsoft PowerPoint - asthmaActionplans3
Asthma Action PlansPamela Wood, M.D.•. Disclaimer: This site is for educational purposes only. Any. information that you found in this. web site is not intended to replace. medical care or advice given to. you by your own physician.
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... Diapositiva di PowerPoint. METHODS. The study was performed in Sicily by 13 pulmonary physicians ... classified as having "newly diagnosed asthma" if a diagnosis of asthma was made for ...
