Human Body Louse
Scientific Name: Pediculus humanus humanus
Order & Family: Order: Psocodea, Family: Pediculidae
Size: 2.5 mm to 3.6 mm

Natural Habitat
Human clothing and skin, typically in crowded or unsanitary conditions
Diet & Feeding
Obligate hematophagy; exclusively feeds on human blood throughout its life cycle
Behavior Patterns
Unlike head lice, they live and lay eggs in the seams of clothing and only move to the skin to feed
Risks & Benefits
Significant health risk; vectors for diseases like epidemic typhus, trench fever, and louse-borne relapsing fever
Identified on: 6/25/2026