
Community identification
Human Louse (Head Louse or Body Louse)
Pediculus humanus (often distinguishing P. humanus capitis or P. humanus humanus)
- Order & Family
- Order: Phthiraptera, Family: Pediculidae
- Size
- Approximately 2 to 3.5 millimeters long (about the size of a sesame seed)
Natural Habitat
Head lice inhabit the human scalp and hair; body lice live in the seams of clothing and bedding, moving to the skin only to feed.
Diet & Feeding
Hematophagous (feeds exclusively on human blood several times a day)
Behavior Patterns
They are wingless parasitic insects that crawl (cannot jump or fly). They use specialized claw-like legs to tightly grasp hair shafts or fabric fibers. Females attach eggs (nits) to hair or clothing seams.
Risks & Benefits
Risks include Pediculosis (infestation causing intense itching), skin irritation, and secondary bacterial infection from scratching. While head lice are not known to spread disease, body lice can transmit pathogens causing typhus and trench fever.