Download Citation on ResearchGate | Ectoparasites: Scabies and Pediculosis Pubis | While not the most lethal of sexually transmitted diseases, pediculosis. Jan 31, Pediculosis Humanis (Lice, Capitis, Pubis) Environmental and to all content and you will be published as an author or editor in eBooks, apps. Pediculosis pubis is an infestation with the crab louse, Phthirus pubis. Lice infestation is found mostly in adolescents and transmission generally occurs during.
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Nov 13, Pediculosis pubis is infestation of pubic or genital region with the pubic louse Phthirus pubis (crab louse). Download chapter PDF. Aug 13, Pediculosis pubis (also known as “crabs” and “pubic lice” is a disease caused by the Infestation usually leads to intense itching in the pubic area. Problems Benign Prostatic Hyperplasia Book eBook PDF Free Download. The Official Patient's Sourcebook on Pubic Lice: A Revised and Updated Directory for the Get your Kindle here, or download a FREE Kindle Reading App.
Pubic lice on the abdomen Pubic lice on the eyelashes The main symptom is itching , usually in the pubic-hair area, resulting from hypersensitivity to louse saliva, which can become stronger over two or more weeks following initial infestation. As with most sexually transmitted pathogens, they can only survive a short time away from the warmth and humidity of the human body. Infestation in a young child or teenager may indicate sexual abuse. Nits are lice eggs. They can be hard to see and are found firmly attached to the hair shaft.
Transmission is thought to occur by head-to-head contact, sharing of headgear, or other direct contacts with fomites inanimate objects that harbor the organism such as movie seats.
They have been reported in all countries and all levels of society. It is estimated that pediculus capitis head lice affects six to 12 million people in the United States every year, but exact numbers are unknown as it is not a reportable disease. Outbreaks of head lice more commonly affect children three to 12 years old, with girls being affected more commonly than boys.
In industrialized countries, small epidemics typically develop in schoolchildren whose tight social bonds allow for the rapid spread of the infestation. It is also common for several members of the same household to be affected.
Head lice cross all socioeconomic barriers, whereas body lice more commonly affect the homeless and displaced. It may take 2 to 6 weeks to develop symptoms after the first exposure, while future pruritis can develop after 1 or 2 days after exposure. History and Physical On physical examination, the diagnosis is confirmed by visualization of at least one louse on visual inspection.
Use of a bright light, magnifying lens, or fine-toothed comb lice comb can aid in diagnosis. Misdiagnosis is common. Finding only nits on examination is not sufficient to confirm a current infestation, as nits can stay on hair for months after successful treatment.
Additionally, dandruff, hair spray debris, and dirt particles can be confused with nits as false positives. Evaluation The diagnosis is made clinically.
In most cases, one may use sticky tape over the infected area to pick up the lice and examine them under a microscope. A wood lamp examination may reveal greenish-yellow fluorescence of the nits and eggs. Wet combing involves moistening the hair and combing the hair root-to-tip with a lice comb.
Cure rates vary widely with this method.
These include pyrethroids, malathion, lindane, benzyl alcohol, topical ivermectin, and spinosad. Recent evidence suggests that resistance to permethrin has been increasing. Eggs hatch after about a week and become nymphs, which look like smaller versions of the adults. The nymphs undergo three molts before becoming adults. Adults are 1.
They are much broader in comparison to head and body lice. Adults are found only on the human host and require human blood to survive. If adults are forced off the host, they will die within 24—48 hours without a blood feeding. Pubic lice are transmitted from person to person most-commonly via sexual contact, although fomites bedding, clothing may play a minor role in their transmission. A magnifying glass or a stereo-microscope can be used for identification.
These products are available over-the-counter without a prescription at a local drug store or pharmacy.
These medications are safe and effective when used exactly according to the instructions in the package or on the label. A second round of treatment is recommended within the following seven to ten days to kill newly hatched nymphs. A second treatment is occasionally required if not improved after 3 to 7 days.
Therefore, all partners with whom the patient has had sexual contact within the previous 30 days should be evaluated and treated, and sexual contact should be avoided until all partners have successfully completed treatment and are thought to be cured. Because of the strong association between the presence of pubic lice and classic sexually transmitted infections STIs , patients may be diagnosed with other STIs.
Because the crab louse can attach its eggs to the very base of the hair shaft just beneath the surface of the skin, shaving the pubic area is not enough to eliminate an infestation. However, waxing might be effective, since it pulls the hair out by the root—however this has not been tested.
The eyelids should be checked as well and treated accordingly. Infections of the eyelashes may be treated with either petroleum jelly applied twice daily for 10 days or malathion , phenothrin , and carbaryl. Accurate numbers are difficult to acquire, because pubic lice infestations are not considered a reportable condition by many governments. Many cases are self-treated or treated discreetly by personal physicians, which further adds to the difficulty of producing accurate statistics.