Being infected with head lice can cause a child to miss classes. The insects are difficult to kill. They can also cause discomfort in the child, who may try to remove them from the skin.
A new study suggests that lice populations in at least half of the 50 states have becomeresistant to the chemical pyrethroid. The substance has been used for years in products to kill the insects.
Seventeen-year old Ben Kupferman of California just returned home from a summer camp. He brought some unwanted visitors with him.
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Study: Head Lice Growing Resistant to Existing Treatments |
"I was just scratching my head and one of the, the lice just came out. It was a, just on my finger,crawling around."
The Centers for Disease Control and Prevention says lice spread to anywhere between six to 12-million children in the United States every year. All these boys and girls are between three and 11-years old.
In the past, parents bought a chemical product at a store and put it on their child's head. It usually killed the lice within a few days. But experts say the product is not aseffective as it once was because the insects have developed tolerance and even resistance to it.
Angela Baker is a doctor at the Children's Hospital of Wisconsin.
"Certain ones (lice) have the potential to mutate and protect themselves against whatever we're using to try to kill them."
David Gaines is a public health entomologist in the state of Virginia. He says lice have been developing resistance to chemical treatments for some time.
"This has probably been coming for many, many years. There's reports of insecticide-resistant lice going backdecades."
When traditional treatments don't work, doctors prescribe stronger drugs. But some parents object to using strong chemicals on their children. They instead want to use a more natural treatment.
Beverly Mann joined with other parents to create a lice-treatment business. Their company uses products that do not have strong chemicals in them.
"Well, we use an all-natural treatment oil and we do give (a) guarantee with our services. So it, it is pesticide-free. We do the combing, we do the picking, so the parent at home doesn't have to." Visit the website www.chinavoa.com to get more information!
Gerry Wolburg launched a lice-removal business three years ago when he found lice on his daughter's head. He uses heat to kill lice eggs.
"It desiccates the, the lice with hot air, and if you leave eggs in the hair they're desiccated -- that means they're, they're shriveled up. They're dried (up) and we like to point out that it's like leaving a boiled egg in a hen-house -- it's not gonna, it's not gonna hatch."
Lice do not carry diseases. But they are troubling, difficult to kill and can make the child feel bad. And they can keep children from attending school for a few days.
I'm Christopher Jones-Cruise.
Zlatica Hoke reported this story from Washington. Christopher Jones-Cruise adapted it for VOA Learning English. George Grow was the editor.
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Words in This Story
lice – n. a small insect that lives on the bodies of people or animals
crawl(ing)– v. to move slowly
tolerance– n. a body's ability to become adjusted to something (such as a drug) so that its effects are experienced less strongly
mutate – v. to change and cause an unusual characteristic or quality to develop in a plant or animal
entomologist– n. a scientist who studies insects
insecticide– n. a chemical substance that is used to kill insects
decade– n. a period of ten years
prescribe – v. to officially tell someone to use (a medicine, therapy or diet) as a treatment
comb – v. to smooth or separate (hair or fibers) with a comb
pick– v. to remove unwanted material from (something) by using your finger or a small tool
desiccate– v. very dry; having the water removed
shrivel – v. to cause (something) to become dry
