Review Article
Emmett James Hughes
Abstract
Asthma is characterized by hypersensitivity of the bronchioles, leading to bronchospasm, oedema of the mucosa and increased secretion of mucous, usually more viscous. This leads to a deficiency in ventilation. There are several factors that are involved, including the release of inflammatory mediators from mast cells (particularly leukotrienes), pollution, stress, pollen, insect and food allergens/ sensitivities, animal hair/fur/dander, food additives, obesity, and genetically modified plants (leading to increased allergens in foods).