PUBIC LICE

 

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Pubic Louse

  • This is an enlargement of a Phthirus pubis, or more commonly known as the pubic or crab louse.
  • Pubic lice are tiny wingless insects that live only on human beings.
  • The primary mode of transmission is via the skin-to-skin contact that occurs during sexual intercourse. Lice are very contagious. There is a 95% chance of transmission during a single episode of sexual intercourse. Rarely they may be transmitted via objects such as infected bed linens or toilet seats.

Pubic Lice in Pubic Hair of Groin Area

  • This patient presented with an infestation of Phthirus pubis, or crab lice.
  • Pubic lice are tiny wingless insects that live only on human beings.
  • The primary mode of transmission is via the skin-to-skin contact that occurs during sexual intercourse. Lice are very contagious. There is a 95% chance of transmission during a single episode of sexual intercourse. Rarely they may be transmitted via objects such as infected bed linens or toilet seats

Symptom Definition

  • Itching of the pubic area is the main symptom.
  • Pubic hair contains gray bugs (lice) 1/16-inch long, that move quickly, and are difficult to see.
  • Nits (white or tan eggs) cemented to hair shafts near the skin (usually within 1/2 inch or 12 mm).  Unlike dandruff or sand, nits can't be shaken off the hair shafts.

General Information

  • Pubic lice are tiny wingless insects that live only on human beings.
  • The primary mode of transmission is via the skin-to-skin contact that occurs during sexual intercourse. Lice are very contagious. There is a 95% chance of transmission during a single episode of sexual intercourse. Rarely they may be transmitted via objects such as infected bed linens or toilet seats.
  • Pubic lice are annoying but cause no serious health problems.
  • They are also referred to as "crabs."
  • Up to 30 % of individuals with pubic lice also have another sexually transmitted disease.

Disclaimer: This information is not intended be a substitute for professional medical advice. It is provided for educational purposes only. You assume full responsibility for how you choose to use this information.

Adult SelfCareNavigator. Copyright © 2000-2004 David Thompson, M.D. FACEP

Reviewed 8/2004

Revised 7/2002

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