Continued exposure to permethrin has caused a huge swath of the dreaded insects to develop genetic mutations that render such drugs useless.

Head Lice Now Resistant to Common Meds in 25 States

By News on the Net US News News——Bio and Archives--August 19, 2015

(HealthDay News) -- Drug-resistant head lice are very likely coming to a school near you, U.S. investigators warn.

At least 25 states host lice populations that don't respond to common over-the-counter treatments, a new analysis reveals. Permethrin, part of the pyrethroid class of insecticides, has long been the go-to weapon against head lice, mosquitoes, bedbugs and other insects. More...

View Comments

News on the Net——Bio and Archives

News from around the world