Pubic louse

Natural Habitat

Exclusively found on humans, primarily in the pubic hair or other coarse body hair such as eyebrows, eyelashes, armpits, or chest hair.

Diet & Feeding

Obligate hematophagous (feeds exclusively on human blood several times a day).

Behavior Patterns

They are slow-moving and cannot jump or fly; they crawl between hairs and use specialized claws to cling to hair shafts. They are typically transmitted through close physical or sexual contact and cannot survive for more than 24-48 hours away from a human host.

Risks & Benefits

Risk: Causes intense itching (pruritus) due to an allergic reaction to their saliva. Excessive scratching can lead to secondary bacterial skin infections. Benefit: None to humans; they are an obligate parasite.

Identified on: 4/26/2026