Body Louse
Scientific Name: Pediculus humanus humanus
Order & Family: Psocodea: Pediculidae
Size: 2.5 mm to 3.5 mm in length

Natural Habitat
Inhabits the clothing and bedding of humans, specifically moving to the skin to feed.
Diet & Feeding
Obligate hematophagous: feeds exclusively on human blood several times a day.
Behavior Patterns
They lay eggs (nits) in the seams of clothing and move to the body only to feed. They are spread by direct physical contact or by sharing infested clothing/bedding.
Risks & Benefits
Serious health risk: they are vectors for diseases such as epidemic typhus, trench fever, and louse-borne relapsing fever. They cause intense itching and skin irritation.
Identified on: 7/1/2026