Head Lice
Head lice or Pediculus humanus capitis, attack as many as 12 million children every year. Lice are spread by direct contact with infested hair. Sharing combs, brushes, beds, and hats may also contribute to the spread of these parasites. Lice infestations in the U.S. are more frequent in girls and lead to stigma and absenteeism from school or day care.