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Head Lice

Exclusion Policies Are Probably Unnecessarily Restrictive

Published in Medical Letter on the CDC and FDA, June 10th, 2001

A common school policy for preventing head lice infestations is probably too restrictive, needlessly excluding many non-contagious children from class, U.S. government research suggests.

At issue are nits - the egg casings for the tiny, itchy, bloodsucking insects. Lice are generally harmless but contagious, and many schools have adopted "no-nit" policies barring youngsters with nits even when there is no evidence of lice.

Nits resemble tiny white grains and may contain developing lice. But some are simply empty shells. They often remain attached to hair long after adequate treatment, according to the study by researchers at the U.S. Centers for...

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