Bug Identifier
Itch mite
Community identification

Itch mite

Sarcoptes scabiei

Order & Family
Order: Sarcoptiformes, Family: Sarcoptidae
Size
Microscopic; females are approximately 0.30 to 0.45 mm long, while males are about half that size.
See this bug in the Encyclopedia

Natural Habitat

Burrows exclusively within the epidermal layer of human skin; they cannot survive more than 2-3 days away from a human host.

Diet & Feeding

Feed on skin cells (keratinocytes) and extracellular fluid as they burrow through the stratum corneum.

Behavior Patterns

The female mite burrows into the skin to lay eggs. These eggs hatch into larvae, develop into nymphs, and then adults. The host's allergic reaction to the mites' proteins and feces causes intense itching.

Risks & Benefits

Causes Scabies, a contagious skin infestation characterized by severe itching and a pimple-like rash. If left untreated, scratching can lead to secondary bacterial infections like impetigo or cellulitis. There are no ecological benefits.