#Lice super strain free#

Even with two treatments, at least 25% of the populations survived,' Clark said. 'We actually have a study out where we applied exactly those materials and followed manufacturer instructions. When used according to directions, RID is effective in killing lice.'Д¬lark said UMass researchers did test the product, along with Nix and Pronto, and found them ineffective.

#Lice super strain free#

The makers of Nix did not respond to a Detroit Free Press request for comment.Д«ut RID, which is made by Bayer Healthcare, sent this response: 'It is important to note that this current study does not address the efficacy of any treatment on resistant head lice. mothers ages 25 or older that shows just 32% who used an over-the-counter treatment say the infestation was eliminated with just one application 68% reported that treatment required two or more applications or that no over-the-counter treatment resolved it, according to the survey funded by Sanofi Pasteur, the maker of the prescription lice treatment Sklice Lotion. Her company uses a heated air system to kill lice and their eggs.Д¬asello-Rees' experience is supported by a new Harris Poll of 2,000 U.S. They're coming to us because they've already tried everything else, and they don't have any other choice,' she said. 'People are not coming to us because they want to spend $145 for a treatment. Sarah Casello-Rees, who owns Rapunzel's Lice Boutique with locations in Michigan, said her business is booming, and it's bolstered by people who say common treatments don't work. It's not a super bug, but a louse that has become resistant.' 'We don't like to use the term super lice, because it's sensational and frightening. 'The more a product is used within a community, the more lice in that community become resistant,' she said. She studies persistent cases of the pests. The lice become stronger, and now they're super because someone didn't treat their kid's head properly.'Дrug-resistant lice tends to crop up in pockets around the country, said Shirley Gordon, director of the Head Lice Treatment and Prevention Project at Florida Atlantic University. 'Over a period of time, they're moving from child to child. 'In irony, that's probably what we're seeing here,' he said. Then, those more-resistant bugs can move from the head of one child to another, spreading super lice. They're then able to tolerate that same medication the next time it is applied. He said that if the instructions aren't followed exactly, the lice can not only survive, but grow stronger. 'We have seen an increased number of cases of it in the last six months,' said Ayers, noting that the biggest challenge in fighting the spread of super lice is the misuse of over-the-counter and prescription treatments. and Canada and found that 99.6% of those tested in 2007-09 were genetically resistant to the pyrethrin- and permethrin-based chemicals most frequently used to treat them those are the chemicals in such over-the-counter lice products as RID and Nix. And that's rapidly happening in the United States,' said John Clark, a professor of environmental toxicology and chemistry at the University of Massachusetts Amherst who was part of a new study published last week in the Journal of the Entomological Society of America.Д¬lark and a team of researchers examined the genes of lice from 32 sites in the U.S.

'You use the product as the manufacturer says, and that product is no longer able to control head lice. The bugs known as super lice have developed genetic mutations that make them resistant to many of the over-the-counter and prescription chemicals that used to kill them. And new research shows that they are becoming increasingly difficult to kill. DETROIT - They're the creepy-crawly critters that make every parent squirm.