Head lice are tiny insects that feed on blood from the human scalp. An infestation of head lice, called pediculosis capitis, most often affects children and usually results from the direct transfer of lice from the hair of one person to the hair of another. Head lice (pediculosis capitis) are highly contagious, and the most prominent symptom of a head lice infestation includes intense scalp itching. The human head louse is a tiny insect that feeds on human blood. The female louse lays eggs (nits) on the hair shaft .
Head lice are treated through manual removal with a comb as well as special shampoos containing chemicals that kill lice. Even if just one nit or adult louse is found, treatment is advised to Author: Erica Roth. Adult head lice are roughly 2–3 mm long. Head lice infest the head and neck and attach their eggs to the base of the hair shaft. Lice move by crawling; they cannot hop or fly. Head lice infestation, or pediculosis, is spread most commonly by close person-to-person contact. Dogs, cats, and other.
Aug 29, 2019 · A mature or adult head louse can lay up to 10 eggs or nits each day. These nits, or lice eggs, hatch in about 7 to 12 days. Baby lice or nymphs are about the size of a pinhead when they hatch and quickly mature into adult lice in about a 9 to 12 days. Adult: The fully grown and developed adult louse is about the size of a sesame seed, has six legs, and is tan to grayish-white in color. Adult head lice may look darker in persons with dark hair than in persons with light hair. To survive, adult head lice must feed on blood.