Abstract
The method of cluster analysis was used to examine the data of Wraith, Cunnington and Seymour to assess the role and allergenic importance of storage mites in house dust and other environments in relation to certain factors thought to influence patients'' exposure to these species. The analysis provided strong statistical evidence that excessively damp housing and occupational risks of exposure were the 2 main factors associated with allergy to these species. Sensitivity to Dermatophagoides pteronyssinus remained unaltered in environmental conditions more favorable to the growth and development of storage mites. The storage species form a group of similar allergens distinct from the house-dust mite.

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