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We report on 2 patients with atopic dermatitis (AD) exacerbated by inhalant allergens: grass pollens in spring (AD as hay fever equivalent) and nonbiting red midges (chironomides) in pet fish food. These clinical observations confirm the existence of an 'extrinsic', IgE-mediated type of AD in a minority of patients, in which the IgE sensitization against specific allergens plays a causal role for the skin disorder.
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Brunello Wüthrich (2009) studied this question.
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