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Pediculosis capitis also known as head lice infestation, is a human medical condition caused by the colonization of the hair and skin by the parasite, Pediculus humanus capitis the head louse. Typically, only the head or scalp of the host is infested. 

Head lice feed on human blood (hematophagy), and itching from lice bites is a common symptom of this condition. Head-lice infestation is widely endemic, especially in children.  

Treatment typically includes application of topical insecticides such as a pyrethrin or permethrin, although a variety of herbal remedies are also common.
Humans are hosts for two other lice as well — the body louse and the crab louse.

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