Body Louse
Scientific Name: Pediculus humanus humanus
Order & Family: Order: Phthiraptera, Family: Pediculidae
Size: 2.5 to 3.5 mm

Natural Habitat
Clothing and bedding of humans; moves to skin to feed
Diet & Feeding
Feeds exclusively on human blood multiple times a day
Behavior Patterns
Lives and lays eggs (nits) in the seams of clothing; only moves to the host's body to feed; typically associated with crowded or unsanitary conditions
Risks & Benefits
Significant health risk as they are primary vectors for diseases such as epidemic typhus, trench fever, and louse-borne relapsing fever. Can cause intense itching and skin rashes.
Identified on: 5/16/2026