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).
Emmett James Hughes
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