Dust mites

Similar term(s): HDM.

Microscopic animals, related to spiders, that thrive in homes in beds and carpets and that are a major cause of asthma and allergic rhinitis.

They eat microscopic moulds and skin dander, and then leave their droppings behind. These droppings are the source of the irritating and allergenic effects of the dust mite.

Source: GreenFacts

House dust mite (Dermatophagoides farinae)

Source: University of California Source: University of California Pests Attacking Man and His Pets 

Asthma

Respiratory Diseases