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Head lice are spread by direct contact with the hair of someone who is infected. [4] The cause of head lice infestations in children is not related to cleanliness. [5] Other animals, such as cats and dogs, do not play a role in transmission. [4] Head lice feed only on human blood and are only able to survive on human head hair.
The number of children per family, the sharing of beds and closets, hair washing habits, local customs and social contacts, healthcare in a particular area (e.g. school), and socioeconomic status were found to be significant factors in head louse infestation. Girls are two to four times more frequently infested than boys.
Experts say there's no reason for a child to miss school over head lice. Here's what parents need to know. 5 important things to know about lice — and why it’s OK to send your kids to school ...
A 2010 study published in Molecular Biology and Evolution indicates that the habitual wearing of clothing began at some point in time between 83,000 years ago and 170,000 years ago based upon a genetic analysis indicating when clothing lice diverged from their head louse ancestors. This information suggests that the use of clothing likely ...
When your child is the temporary home for these blood-sucking freeloaders, the social issue can sometimes be more overwhelming than the physical issue.
[16] [17] Normally head lice infest a new host only by close contact between individuals, making social contacts among children and parent child interactions more likely routes of infestation than shared combs, brushes, towels, clothing, beds or closets. Head-to-head contact is by far the most common route of lice transmission. [citation needed]
In newly published guidance, the AAP says it's actually fine to send kids to school with lice. In the guidance, the AAP points out that head lice are "not a health hazard nor sign of poor hygiene."
Regarding the decision to change school policies, the CDC said, "Unnecessary days off cause a burden to the students, families, and communities, and far outweighs the risks associated with head lice."