The incubation period for head lice is one week for the nits (lice eggs) to hatch. Maturity occurs roughly 8-10 days after hatching. Signs and symptoms include an infestation of the head and hairy parts of the body with adult lice, larvae, and nits that results in itching and irritation of the scalp and skin. Female lice are the size of a sesame seed, and eggs or nits are tiny tan or pearl gray specks attached to the hair shaft close to the scalp. Head lice is transmitted through person to person contact with an infected person. This can occur through sharing hats, combs, and brushes. Lice do not jump or fly, and hair length does not affect infestation. Lice can spread from the time of infestation until after completion of the first treatment. In order to control the spread of head lice, it is advised students with lice to stay home until after the first treatment. A student will need to be re-treated in 7-10 days to kill the remaining nits. All products should be used according to the manufacturer's directions. Lice cannot live away from the host for more than 48 hours. Eggs cannot survive away from the scalp for more than 7 days. Thoroughly vacuum the environment including furniture. Washable items should be cleaned in hot water and/or with the hottest dryer setting to destroy lice and nits. Non-washable items should be dry cleaned or stored in tightly sealed plastic bags for 10 days to destroy nits. Soak combs and brushes in hot water for 10 minutes or wash with pediculicide shampoo. The local health department should be notified of any lice outbreaks.