Lice

Common Name(s)

Lice

Lice are very small, wingless insects that feed on human blood. There are three types of lice that affect humans: head lice, body lice and pubic lice. Head lice are the more common type of lice and develop on the hair and skin of the head (scalp). Body lice typically live in clothing and bedding, but move to the skin to feed. Pubic lice (crabs) live on the skin and hair in the pubic area. Lice are very easily spread through close contact. Symptoms of lice include intense itching, a tickling feeling in the hair, and small, red bumps on scalp, neck, and shoulders.

A person can get lice by coming into contact with lice or their eggs (nits). They are usually spread by close contact with individuals who have lice. Risk factors for getting lice include attending school or work with a person with lice and living in crowded and unclean conditions. Having many sex partners increases the risk for pubic lice. A diagnosis of head lice can be made when a live young or adult louse is seen on the scalp or hair or if a nit is seen on the hair within a ¼ inch from the scalp. Body lice can be diagnosed if lice or their eggs are seen in the seams of clothing or on bedding. Pubic lice can be diagnosed when moving lice or nits are seen on hair or skin of the pubic area. A person affected with lice can usually be treated with over-the-counter treatments for lice. If over-the-counter lice treatment does not work, your doctor may recommend prescription medications. If you or your child has been diagnosed with lice, talk with your doctor to discuss the best treatment recommendation.

Source: Advocacy organizations associated with the condition.

 

Advocacy and Support Organizations

 

Condition Specific Organizations

Following organizations serve the condition "Lice" for support, advocacy or research.

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National Pediculosis Association, Inc

The National Pediculosis Association®, Inc. (NPA) is the only non-profit health and education agency dedicated to protecting children from the misuse and abuse of potentially harmful lice and scabies pesticidal treatments. As part of its mission, the NPA works to encourage our nation's health and child care professionals to adopt standardized head lice management programs in an effort to keep the children in school lice and nit free.

Last Updated: 25 Jun 2015

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The STD Project

Established in April of 2012 during STD Awareness Month, The STD Project is a multi-award-winning independent website and progressive movement eradicating STD stigma by facilitating and encouraging awareness, education, and acceptance through story-telling and resource recommendations. We are taking steps toward modern-day sexual health and prevention by advocating for conscientious and informed decisions.

Last Updated: 11 Jul 2016

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General Support Organizations

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Advocacy and Support Organizations

 

Condition Specific Organizations

Following organizations serve the condition "Lice" for support, advocacy or research.

Logo
National Pediculosis Association, Inc

The National Pediculosis Association®, Inc. (NPA) is the only non-profit health and education agency dedicated to protecting children from the misuse and abuse of potentially harmful lice and scabies pesticidal treatments. As part of its mission, the NPA works to encourage our nation's health and child care professionals to adopt standardized head lice management programs in an effort to keep the children in school lice and nit free.

http://www.headlice.org/

Last Updated: 25 Jun 2015

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The STD Project

Established in April of 2012 during STD Awareness Month, The STD Project is a multi-award-winning independent website and progressive movement eradicating STD stigma by facilitating and encouraging awareness, education, and acceptance through story-telling and resource recommendations. We are taking steps toward modern-day sexual health and prevention by advocating for conscientious and informed decisions.

http://www.thestdproject.com/

Last Updated: 11 Jul 2016

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General Support Organizations

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Scientific Literature

Articles from the PubMed Database

Research articles describe the outcome of a single study. They are the published results of original research.
The terms "Lice" returned 153 free, full-text research articles on human participants. First 3 results:

Acute prurigo simplex in humans caused by pigeon lice.
 

Author(s): Hamilton Ometto Stolf, Rejane d'Ávila Reis, Ana Cláudia Cavalcante Espósito, Vidal Haddad Júnior

Journal: An Bras Dermatol. 2018 Mar;93(2):285-287.

 

Pigeon lice are insects that feed on feathers of these birds; their life cycle includes egg, nymph and adult and they may cause dermatoses in humans. Four persons of the same family, living in an urban area, presented with widespread intensely pruritic erythematous papules. A great ...

Last Updated: 31 Dec 1969

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Body lice of homeless people reveal the presence of several emerging bacterial pathogens in northern Algeria.
 

Author(s): Meriem Louni, Nassima Mana, Idir Bitam, Mustapha Dahmani, Philippe Parola, Florence Fenollar, Didier Raoult, Oleg Mediannikov

Journal:

 

Human lice, Pediculus humanus, are obligate blood-sucking parasites. Body lice, Pediculus h. humanus, occur in two divergent mitochondrial clades (A and D) each exhibiting a particular geographic distribution. Currently, the body louse is recognized as the only vector for louse-borne ...

Last Updated: 31 Dec 1969

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Preliminary report of body lice infesting homeless people in Brazil.
 

Author(s): Mara Lucia Gravinatti, Álvaro A Faccini-Martínez, Sandro Ricardo Ruys, Jorge Timenetsky, Alexander Welker Biondo

Journal: Rev. Inst. Med. Trop. Sao Paulo. 2018 ;60():e9.

 

Last Updated: 31 Dec 1969

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Reviews from the PubMed Database

Review articles summarize what is currently known about a disease. They discuss research previously published by others.
The terms "Lice" returned 21 free, full-text review articles on human participants. First 3 results:

Head Lice.
 

Author(s): Laura Meister, Falk Ochsendorf

Journal: Dtsch Arztebl Int. 2016 Nov;113(45):763-772.

 

Conflicting information about the proper treatment of head lice has given rise to uncertainty among patients and treating personnel. For example, the reported efficacy of permethrin fell from 97% in the 1990s to 30% in 2010.

Last Updated: 31 Dec 1969

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Management and Treatment of Human Lice.
 

Author(s): Abdoul Karim Sangaré, Ogobara K Doumbo, Didier Raoult

Journal: Biomed Res Int. 2016 ;2016():8962685.

 

Of the three lice (head, body, and pubic louse) that infest humans, the body louse is the species involved in epidemics of louse-borne typhus, trench fever, and relapsing fever, but all the three cause pediculosis. Their infestations occur today in many countries despite great efforts ...

Last Updated: 31 Dec 1969

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Head lice.
 

Author(s): Ian F Burgess, Paul Silverston

Journal:

 

Head louse infection is diagnosed by finding live lice, as eggs take 7 days to hatch (but a few may take longer, up to 13 days) and may appear viable for weeks after death of the egg. Infestation may be more likely in school children, with risks increased in children with more siblings ...

Last Updated: 31 Dec 1969

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Symptoms, Diagnosis, and Treatment

There are currently no related results available in Genetics Home Reference.

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Clinical Trial Information This information is provided by ClinicalTrials.gov

Treatment of Pediculosis (Head Lice) in Senegal
 

Status: Recruiting

Condition Summary: Pediculoses

 

Last Updated: 7 Aug 2018

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Clinical Endpoint Study of Ivermectin 0.5% Lotion
 

Status: Recruiting

Condition Summary: Head Lice

 

Last Updated: 22 Nov 2017

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Scrub Typhus RDT Study
 

Status: Recruiting

Condition Summary: The Prevalence of Scrub Typhus

 

Last Updated: 5 Jan 2018

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