Body Louse
Scientific Name: Pediculus humanus humanus
Order & Family: Order: Psocodea (Phthiraptera); Family: Pediculidae
Size: 2.3 to 3.6 mm long

Natural Habitat
Typically found on human clothing and bedding, particularly in the seams; they only move to the skin to feed.
Diet & Feeding
Obligate blood-feeders; they consume human blood several times a day.
Behavior Patterns
They are highly specialized parasites that live in the folds of clothing and lay eggs (nits) on fabric fibers. They spread through direct physical contact or by sharing infested clothing/bedding.
Risks & Benefits
Risks include intense itching and skin rashes (pediculosis). Crucially, they are vectors for serious diseases such as epidemic typhus, trench fever, and louse-borne relapsing fever. There are no ecological benefits to humans.
Identified on: 4/10/2026