House-dust mites are members of the arachnid family — a family that includes spiders, chiggers, and ticks. Like spiders, they have eight legs, but the mites themselves are sightless and completely harmless, since they do not bite, sting, or transmit diseases of any description. Their natural diet consists of shed human skin scales, plant fibers, house dust, fungal spores, pollen grains, and insect scales.
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