Utah State University Extension
Lice infestations on humans, called pediculosis, is very common worldwide. Lice can transmit disease and are parasitic insects on humans, pets and livestock. Lice belong to the order Phthiraptera and are generally divided into two groups based on mouthparts and feeding preferences. Chewing lice (Mallophaga) have well developed mandibles and eat skin, feathers, and fur from birds and mammals.
Hodgson, Erin W., "Human Lice" (2008). All Current Publications. Paper 915.