Lice

Definition 1

A taxonomic order of wingless insects that are obligate ectoparasites of birds and mammals. Lice attach tightly to hair, fur, and feathers of the host organism and feed on blood, skin, and sebaceous secretions. (NCI Thesaurus)

Definition 2

A general name for small, wingless, parasitic insects, previously of the order Phthiraptera. Though exact taxonomy is still controversial, they can be grouped in the orders ANOPLURA (sucking lice), MALLOPHAGA (biting lice), and Rhynchophthirina (elephant-lice). (NLM, Medical Subject Headings)

More information

Lice are parasitic insects that can be found on people's heads and bodies. They survive by feeding on human blood. Lice found on each area of the body are different from each other. The three types of lice that live on humans are head lice, body lice (also called clothes lice), and pubic lice ("crabs").

Symptoms of lice may include
• Intense itching
• Rash
• Visible nits (lice eggs) or crawling lice

Lice spread most commonly by close person-to-person contact. Dogs, cats, and other pets do not spread human lice. Lice move by crawling. They cannot hop or fly. If you get lice, both over-the-counter and prescription medicines are available for treatment. (Centers for Disease Control and Prevention)

Also called: Crab Lice

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