Head lice can be passed from person to person through direct contact. There are many misconceptions about head lice. They do not transmit communicable diseases. They do not jump or fly; they can only crawl. Head lice depend completely on their host for nourishment; their only source of food is human blood.
The prevalence of head lice infestation is no different in individuals with long hair than in those with short hair. Head lice seldom occur on eyebrows or eyelashes. They infest persons from all socioeconomic levels, without regard for age, race, sex or standards of personal hygiene. Animals are not a source of human lice.