Pediculus humanus capitis

Pediculus humanus capitis (pronunciation: peh-DIK-yoo-lus HYOO-muh-nus KAP-i-tis), commonly known as the head louse, is a parasitic insect that is found on the hair, eyebrows, and eyelashes of humans. Head lice are obligate parasites, meaning they can only survive on human blood.

Etymology

The term "Pediculus humanus capitis" is derived from Latin. "Pediculus" translates to "little foot", "humanus" means "human", and "capitis" means "of the head". This name accurately describes the organism's morphology and its habitat on the human head.

Life Cycle

The life cycle of the head louse consists of three stages: egg (also known as a nit), nymph, and adult. The female louse lays eggs on the hair shaft close to the scalp where the temperature is optimal for incubation. After a week, the nits hatch into nymphs, which mature into adults within 10 days.

Symptoms and Treatment

Infestation with head lice is known as pediculosis capitis. Symptoms include intense itching caused by an allergic reaction to louse saliva, and the presence of nits on the hair. Treatment typically involves the use of over-the-counter pediculicides, followed by manual removal of nits.

Related Terms

Pediculosis: The condition of being infested with lice.
Pediculicide: A substance used to kill lice.
Nit: The egg of a louse.

Pediculus humanus capitis

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