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Definition of Dust mite

Dust mite: A tiny microscopic organism that is the primary cause of allergies related to house dust. The term "dust mite allergy" is a misnomer because it is the fecal excretion of these mites to which people are allergic. Dust mites can therefore trigger allergic reactions even when dead.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=25555
Last Editorial Review: 9/20/2012

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