M. KALAB, CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY M. KALAB, CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
House dust. Coloured scanning electron micrograph (SEM) of household dust from Brazil. Fibres from clothing and carpeting are seen. At centre is a dust mite (pink), a relation of the spider, which feeds on shed flakes of human skin. Typically, house dust also comprises a mixture of fungal spores, pollen, skin flakes and hair, along with sand and soil particles. Dust, particularly that containing large numbers of dust mites, can provoke allergic reactions. Magnification unknown.
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