Dust Mite
Dermatophagoides spp. (e.g., Dermatophagoides pteronyssinus, Dermatophagoides farinae)
- Order & Family
- Order: Sarcoptiformes, Family: Pyroglyphidae
- Size
- Typically 0.2-0.3 mm (0.008-0.012 inches) in length, making them microscopic and invisible to the naked eye.
Natural Habitat
Dust mites thrive in warm (20-25 C or 68-77 F), humid environments (70-80% relative humidity) and are commonly found in human dwellings. They inhabit mattresses, pillows, bedding, upholstered furniture, carpets, and curtains.
Diet & Feeding
Dust mites feed primarily on dead human and animal skin flakes (dander), as well as other organic detritus found in household dust.
Behavior Patterns
Dust mites are not parasites; they do not bite or burrow into skin. They are largely nocturnal and are most active in conditions of high humidity. Their life cycle from egg to adult is about 3-4 weeks, and an adult mite lives for about 2-3 months, laying approximately 60-100 eggs during its lifetime.
Risks & Benefits
Potential risks include triggering allergic reactions and asthma in sensitive individuals due to their fecal pellets and body fragments. Symptoms can include sneezing, runny nose, itchy eyes, skin rashes, and difficulty breathing. There are no known direct benefits of dust mites to humans or the ecosystem, though they contribute to the decomposition of organic matter in indoor environments.