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Time For Lice To Go

Researchers from University of North Carolina at Chapel Hill had discovered a new way that might prevent lice from infecting human hair for long. Their study was published in the July 2005 issue of the Journal of the American Academy // of Dermatology.

Contrary to popular myths about hair texture, hygiene and social background, anyone can become infested with lice. Young children are particularly susceptible because they tend to share things like hats and hairbrushes, which can harbor lice.

The available lice treatments do not reliably kill the louse egg and the increasing prevalence of lice in certain locations throughout the world suggests that lice have built up a resistance to the chemicals that are used to kill them said the researchers.

Human head lice, like many other insects, apply a protective coating, or glue, over their newly laid eggs. Called the nit sheath, this coating is made up of a protein that is remarkably similar to that of human hair and serves to protect the developing larva. Because of this, anything that would be effective at dissolving the nit sheath also would dissolve the hair shaft.

A treatment that could prevent the glue from solidifying on the nit sheath would prevent the egg from adhering to the hair. Such treatment would be beneficial to both people with lice infestation and those who are trying to avoid acquiring one. A liquid paraffin preparation, similar to that used to prevent bird eggs from hatching, also could possibly suffocate the larva by severely decreasing the flow of oxygen to it, suggested the researchers.

The study authors think that other potential for new treatments will be breaking the bonds that attach the egg to the hair shaft and thus allow for easier nit removal, rather than insecticide treatments that kill the lice and their eggs. Nevertheless, the insecticide, ivermectin, in a topical form in an oil base also shows great promise.

Source: Newswi se

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