Common House Dust Mite
Scientific Name: Dermatophagoides pteronyssinus
Order & Family: Order: Sarcoptiformes; Family: Pyroglyphidae
Size: 0.2–0.3 mm (0.008–0.012 inches); microscopic and generally invisible to the naked eye.
Natural Habitat
Indoor environments, predominantly found in soft materials such as mattresses, pillows, carpets, and upholstered furniture.
Diet & Feeding
Feeds on dead human and animal skin cells (dander) and organic matter found in household dust.
Behavior Patterns
Thrives in warm, humid conditions (70-80% humidity). They do not drink water but absorb moisture from the air. Life cycle typically lasts 65-100 days.
Risks & Benefits
Major source of allergens for humans; their feces and discarded exoskeletons can trigger asthma, eczema, and allergic rhinitis. They offer no direct benefits to humans or the indoor ecosystem.
Identified on: 3/12/2026