House Dust Mite
Dermatophagoides spp. (e.g., Dermatophagoides pteronyssinus)
- Order & Family
- Order: Sarcoptiformes, Family: Pyroglyphidae
- Size
- Microscopic, typically 0.2 to 0.3 millimeters in length (generally invisible to the naked eye without magnification).
Natural Habitat
Found indoors within fibrous materials such as mattresses, bedding, pillows, carpets, upholstered furniture, and clothing; they thrive in warm, humid environments.
Diet & Feeding
Detritivores that feed primarily on dead skin cells (dander) shed by humans and animals, as well as fungal spores.
Behavior Patterns
These microscopic arachnids do not bite or burrow into living skin. They congregate in colonies within fabrics where moisture and food accumulate, producing enzymes to digest difficult proteins in skin cells.
Risks & Benefits
Risks include significant allergic reactions in humans (sneezing, itchy eyes, eczema) and asthma attacks triggered by inhaling their fecal pellets and decaying body fragments. They are not parasitic and pose no direct bite threat.