Scabies Mite
Scientific Name: Sarcoptes scabiei var. hominis
Order & Family: Order: Sarcoptiformes, Family: Sarcoptidae
Size: Microscopic; females are typically 0.3–0.45 mm long, while males are slightly smaller at 0.2–0.35 mm.
Natural Habitat
The epidermis (outer layer) of human skin; they cannot survive for long periods (more than 2-3 days) away from a human host.
Diet & Feeding
Feeds on dissolved human tissue and skin cells within the burrows they create.
Behavior Patterns
The female mite burrows into the upper layer of the skin to live and lay eggs. This burrowing activity creates characteristic serpentine tracks. They are most active at night, which correlates with intense nocturnal itching in infested individuals.
Risks & Benefits
Risks include intense itching (pruritus), especially at night, and a pimple-like skin rash. Scratching can lead to secondary bacterial infections like impetigo or eczema. They are highly contagious through direct, prolonged skin-to-skin contact. There are no known ecosystem benefits as they are obligate parasites.
Identified on: 2/20/2026