Community identification
Dust Mite
Dermatophagoides pteronyssinus (European) or Dermatophagoides farinae (American)
- Order & Family
- Order: Sarcoptiformes; Family: Pyroglyphidae
- Size
- 0.2–0.3 mm (too small to be seen clearly by the naked eye without magnification)
Natural Habitat
Indoor environments, predominantly in bedding, carpets, upholstered furniture, and mattresses where humidity is high.
Diet & Feeding
Dead skin cells (dander) shed by humans and pets; they also consume certain molds.
Behavior Patterns
They thrive in warm, humid conditions (70-80% humidity) and avoid light by nesting deep within fabric fibers. They follow a life cycle of egg, larva, protonymph, tritonymph, and adult.
Risks & Benefits
No benefits to humans. They are a major source of allergens; their waste products and decaying body parts can trigger asthma, eczema, and allergic rhinitis (hay fever) in sensitive individuals.