Community identification
Human Itch Mite
Sarcoptes scabiei var. hominis
- Order & Family
- Order: Sarcoptiformes, Family: Sarcoptidae
- Size
- 0.3 to 0.45 mm for females; males are roughly half that size
Natural Habitat
The epidermis (outer layer) of human skin, specifically in stratum corneum burrows
Diet & Feeding
Skin cells and extracellular fluid (serum) obtained by burrowing through the skin
Behavior Patterns
The female mite burrows into the upper layer of the skin to lay eggs. This activity causes an allergic reaction and intense itching, typically worse at night. The life cycle involves egg, larva, nymph, and adult stages, all occurring on a human host.
Risks & Benefits
Risks include scabies (a contagious skin infestation), secondary bacterial infections from scratching, and social stigma. There are no known ecological benefits for humans; it is an obligate parasite.