Time-Based Measurement of Personal Mite Allergen Bioaerosol Exposure over 24 Hour Periods.

Allergic diseases such as asthma and rhinitis are common in many countries. Globally the most common allergen associated with symptoms is produced by house dust mites. Although the bed has often been cited as the main site of exposure to mite allergens, surprisingly this has not yet been directly established by measurement due to a lack of suitable methods.

The vertical distribution of house dust mite allergen in carpet and the effect of dry vacuum cleaning.

Background: Carpets are large reservoirs of the dust mite allergen Der p 1. The effect of vacuum cleaning on the distribution of Der p 1 in carpets is poorly understood.

Methods: Samples were cut from 7 used household carpets, all over 5 years of age.