Summary Purified house dust allergen irradiated with UV‐light loses its capacity to elicit immediate type skin and bronchial provocation reactions in the majority of asthmatic patients. However, in some patients both immediate and/or late bronchial reactions were observed to the active house dust and its inactivated counterpart. Immunotherapy with UV‐irradiated house dust allergen, which hyposensitized 66% of forty‐eight asthmatic patients allergic to house dust, was as effective as treatment with aluminium oxide‐adsorbed active house dust, and there were fewer adverse side‐effects.
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Hénocq et al. (1973) studied this question.