“Asthma is a disorder of the airways characterized by paroxysmal or persistent symptoms (dyspnea, chest tightness, wheeze and cough), with variable airflow limitation [and] airway hyperresponsiveness to a variety of stimuli. Airway inflammation (including mast cells and eosinophils) or its consequences is important in the pathogenesis and persistence of asthma. This provides a strong argument for the recommendation that the management of asthma should focus on the reduction of this inflammatory state through environmental control measures and the early use of disease-modifying agents, rather than symptomatic therapy alone.” (Canadian Asthma Consensus Conference, 1996).
Asthma is one of the most prevalent chronic conditions affecting Canadians. It places a heavy burden on the nation’s health care expenditures, reduces productivity, and seriously affects the quality of life for individuals with asthma and their families. This report summarizes the definition, prevalence and impact of asthma, and includes a review of both the scope for prevention and control, and existing activities in Canada. It is based on current literature reviews, reports, health data, and surveys.