Head Lice Infestation
(Pediculosis)

• Head lice are parasites that are found on human heads. The word lice is plural for louse.
• Head lice are spread by personal contact or the sharing of combs, brushes, caps, and other clothing.
• Head lice are a common problem with preschool and schoolchildren.
• Head lice cause a tickling feeling of something moving in the hair, itching, and sores on the head.
• The affected individual, family members also infected, and the home all should be treated.
• Remember: one head louse + one head louse = two head lice = the beginning of a head-lice infection.
• Very young children should be evaluated by a health care professional before beginning medications.

Head lice are parasites that can be found on the heads of people. Infection with head lice is called pediculosis. (The head louse, Pediculus humanus capitis, is different from the lice that cause body and pubic-hair infections.)

Head lice infection is very common. It has been estimated that up to one in every 10 children in school acquires head lice at some time. In one study, the estimated annual cost of head lice infestations in the United States was nearly $1 billion dollars.

Anyone who comes in close contact with someone who already has head lice, or even their contaminated clothing and other belongings, is at risk for acquiring head lice. So it is easy to transmit head lice from one person to another. Preschool and elementary-school children (3-10 years of age) and their families are infected most often. Girls contract head lice more often than boys, and women contract more head lice than men. African-Americans rarely acquire head lice.

Source: MedicineNet.com
http://www.medicinenet.com/head_lice/article.htm