Dust mite and predator. Coloured scanning electron micrograph (SEM) of a house dust mite (Dermatophagoides pteronyssinus) caught in the jaws of another mite (Cheyletus sp.). Millions of dust mites inhabit the home, feeding on shed skin cells. They mainly live in furniture, and are usually harmless. However, the excrement and dead bodies of both these mites may cause allergic reactions in susceptible people. Magnification unknown.
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