Body Louse
Scientific Name: Pediculus humanus humanus
Order & Family: Order: Psocodea / Family: Pediculidae
Size: 2.3 to 3.6 millimeters in length (about the size of a sesame seed).

Natural Habitat
Exclusively found on human hosts, primarily living in the seams of clothing and bedding of individuals with poor hygiene or in crowded conditions.
Diet & Feeding
Obligate hematophages; they feed exclusively on human blood several times a day.
Behavior Patterns
Unlike head lice, body lice live and lay eggs (nits) in clothing, only moving onto the skin to feed. They are spread through direct body contact or sharing infested clothing and bedding.
Risks & Benefits
Significant health risks; they can cause intense itching (pediculosis) and are vectors for serious diseases including bacterial typhus, trench fever, and epidemic relapsing fever.
Identified on: 2/17/2026