Body lice

Alternative names:

lice; lice - body

Definition:

Tiny parasitic insects (Pediculus humanus corporis) that can be spread by close contact with other people.

Causes, incidence, and risk factors:

There are three types of lice: head lice, body lice, and pubic lice. Body lice may be 2 to 3 mm long, whereas head and public lice are much smaller. They feed on human blood, and they lay their eggs and deposit their fecal matter on the skin (they may also lay their eggs in clothing). Infestation by body lice causes intense itching. When body lice are not feeding on blood, they live in the seams and folds of clothing. Subsequently, body lice are transmitted by contact with infected clothing and bedding as well as by direct contact with an infected person.

Risk factors include close, overcrowded living conditions, and poor hygiene. Lice are often spread among school children.