Attempts to reduce the growth of house dust pyroglyphid mites by vacuum cleaning, and modifications of temperature and humidity are useful but not sufficient. Their absence in dust from hospital beds which are disinfected led the authors to test PARAGERM AK, a non toxic bactericidal and fungicidal spray. This proved highly effective as an acaricide, killing off cultures of Dermatophagoides spp. and other mites with acceptable arid easily produced concentrations, thus providing a new way of combating the house dust allergy mite.
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