Bug Identifier
Pubic louse (Crab louse)
Community identification

Pubic louse (Crab louse)

Pthirus pubis

Order & Family
Order: Psocodea (formerly Anoplura), Family: Pthiridae
Size
1.1 mm to 1.8 mm (about the size of a pinhead)
See this bug in the Encyclopedia

Natural Habitat

Coarse human body hair, primarily in the pubic region, but occasionally eyelashes, beard, or chest hair.

Diet & Feeding

Obligate hematophage; they feed exclusively on human blood several times a day.

Behavior Patterns

They are relatively immobile and grasp hair shafts using specialized claw-like legs. They cannot jump or fly and generally spread through close physical contact.

Risks & Benefits

Risks include intense itching (pruritus) due to hypersensitivity to saliva, and secondary bacterial infections from scratching. They are not known to transmit systemic diseases.