Advice on how to avoid Head Lice infestation
FRIDAY, March 14, 2014 (HealthDay News) — Most head lice found in North America now carry a gene mutation that makes them resistant to standard over-the-counter treatments, a new study cautions.
Head lice infestation is a major public-health issue, the researchers said, with roughly 10 percent of all American school-aged children missing school due to the intense itching and secondary infections that signal exposure. The problem: Years of relentless exposure to a single treatment option has given rise to a surviving head lice population that is armed with what geneticists call “knockdown resistance,” in the form of the TI genetic mutation.
This gives most of today’s head lice an ability to withstand exposure to the main — and previously effective — ingredients found in most nonprescription head lice drugs: “pyrethroid” compounds such as permethrin.
“This isn’t really controversial,” said study co-author John Clark, a professor of environmental toxicology and chemistry at the University of Massachusetts, Amherst. “This is a problem we’ve been showing in development over a period of about 20 years. But our new work now shows that head lice are now almost 100 percent [knockdown resistant]. That means there’s an awful lot of resistant insects out there in the U.S. and elsewhere.” READ MORE on Advice on how to avoid Head Lice infestation.