Body Lice

Body lice are small, wingless insects found on the clothing and body of an infested person. They can be transmitted through contact with an infested person's clothing or bedding, as well as by skin-to-skin contact. The most common symptom of an infestation is frequent, intense itching. Body lice are usually treated by laundering or throwing away the infested person's clothing and bedding. In some situations, medication may also be required.

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Body lice are parasitic insects that live on the body, and in the clothing or bedding of infested humans. Infestation is common, found worldwide, and affects people of all races. Body lice infestations spread rapidly under crowded conditions where hygiene is poor, and there is frequent contact among people.
Body lice infestation is unlikely to persist on anyone who bathes regularly and who regularly has access to freshly laundered clothing and bedding.
This photograph reveals the presence of crab lice with reddish-brown crab feces.  Pubic lice are generally found in the genital area on pubic hair; but may occasionally be found on other coarse body hair, such as hair on the legs, armpit, mustache, beard, eyebrows, and eyelashes.
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An Introduction to Body Lice

Also called Pediculus humanus corporis, body lice are small, wingless insects found on clothing and the body of infested people. A body louse (body lice is plural) has three pairs of legs located directly behind the body. The legs end in sharp claws that are designed for feeding and allow the louse to hold on tightly to clothing or hair.
 
When a person is infested with lice (whether it is body lice, head lice, or pubic lice), the condition is known as pediculosis. However, body lice are not the same as head lice. Lice found on the hair and head are caused by an infestation with another parasite known as Pediculus humanus capitis.
 

Who Gets Body Lice?

Anyone can get body lice. Such infestations are common and are found worldwide, affecting people of all races. These infestations spread rapidly under crowded conditions where hygiene is poor and where there is frequent contact among people.
 
In the United States and other developed countries, body lice are found mainly in homeless, transient populations who don't have regular access to baths or changes of clothes. Infestation is unlikely to persist on anyone who bathes regularly and who has regular access to freshly laundered clothing and bedding.
 
(Click Causes of Body Lice for more information.)
 
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Written by/reviewed by: Arthur Schoenstadt, MD
Last reviewed by: Arthur Schoenstadt, MD
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