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  • Title: [From atopic dermatitis to asthma].
    Author: Marín A, Eseverri JL, Botey J.
    Journal: Allergol Immunopathol (Madr); 1998; 26(3):114-9. PubMed ID: 9675392.
    Abstract:
    The prevalence of atopic dermatitis and other allergic diseases is increasing in industrialized countries. Today we know that atopy is conditioned genetically, but the development of the atopic phenotype requires environmental factors. It is believed that the genetic factors have not changed and that the increased prevalence is due to the increase in exposure to allergenic and non-specific environmental factors. The potential for sensitization is greater in the early years of life, so it is necessary to reduce harmful environmental exposure at these ages. Atopic clinical manifestations develop sequentially, in many cases beginning with atopic dermatitis in the early months of life. We know that children with atopic dermatitis present non-specific bronchial hyperreactivity (58 to 82%), which is a risk factor for the later development of asthma. The presence of specific bronchial hyperreactivity for mites in atopic dermatitis with mite sensitization also has been described, and it has been demonstrated that signs of eczema can develop or become exacerbated by airway exposure during bronchial challenge tests. The evolution from atopic dermatitis to asthma is a possibility that must be kept in mind. Patients should be followed-up and study of hyperreactivity and sensitization to allergens should be carried out in order to prevent the development of clinical symptoms. Prevention should include pneumoallergens, food allergens, and non-specific environmental risk factors, such as parental smoking (particularly mothers), pollution inside and outside the home, etc. Prevention is particularly important in children at risk of allergy, as determined by a family history among first-degree relatives, as well as the presence of atopic dermatitis, particularly of early onset, because these patient are most at risk of developing bronchial asthma in later years. At present, pharmacological prevention is being studied, without overlooking environmental prevention, in children at high risk of atopic disease for the purpose of preventing chronic inflammations that will condition their future as adults. In our daily clinical experience, atopic dermatitis is responsible for 8% of visits to a pediatric allergology unit. We emphasize that 62.5% of our patients with dermatitis are referred when they already have bronchial asthma, which represents an important delay in diagnosis with respect to the onset of symptoms.
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