The house dust mite and its importance in asthma.

This short film looks at the presence of house dust mites and assesses how they might affect asthma. The Brompton Hospital conducts a 'bronchial challenge' test in which asthmatic patients are given house dust mite extract and their breathing is assessed. We also see an allergic prick test being done on a young boy. Close-up footage shows the mite itself and advise is given on how to avoid it getting into bedding.