POWER AND SYRED / SCIENCE PHOTO LIBRARY POWER AND SYRED / SCIENCE PHOTO LIBRARY
Dust mite. Coloured Scanning Electron Micrograph (SEM) of a dust mite Dermatophagoides sp., in a sample of household dust. It is crawling among hair, fibres and other dust debris. This mite is a cause of dermatitis (skin inflammation) and is implicated as a cause of asthma. Every house has millions of tiny dust mites, living in carpets and furniture and feeding on the flakes of skin shed by their human landlords. The average double bed contains about two million dust mites of various species. The body of the mite is made up of three regions: gnathosoma (head, at centre left); propo- dosma (with first two pairs of legs); hysterosoma (abdomen). Magnification: x150 at 6x7cm size.
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