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Effective insecticide-treated clothing against disease-carrying ticks

FRIDAY, May 25, 2018: outdoor enthusiasts: these are some good news to fight against tick just in time for Memorial Day weekend and the unofficial start of summer.

A new study by the US government. UU Confirms that the treatment with insecticide clothing marketed to prevent diseases transmitted by ticks, in fact, frustrates pests.

In lab tests of clothes purchased from a manufacturer, the researchers discovered that the garments quickly caused the ticks to fall, or that they could not bite.

The study included three types of ticks that, in the United States, are major carriers of diseases, such as Lyme disease, Rocky Mountain spotted fever and what is known as tick-borne rash disease. South, or STARI.

The clothing was pretreated with permethrin, a synthetic form of a compound that rubs the insects of the chrysanthemum flower. It is used in insecticidal sprays, shampoos and creams that treat lice and scabies.

Several companies already market shirts, pants, socks and other garments treated with permethrin, as a way to avoid disease-transmitting pests. The new study adds evidence that garments are really toxic to ticks, according to lead researcher Lars Eisen of the Centers for Disease Control and Prevention.

"All the tick species and life stages evaluated experienced the 'hot foot' effect after coming into contact with the clothes treated with permethrin," said Eisen.

That, he explained, caused ticks to fall out of "vertically oriented" clothing, which would simulate a pair of pants when a person is standing. 19659002] Also, Eisen said, when the ticks were in contact with the clothes for up to five minutes, they lost their ability to move normally and bite.

There are still questions, he said, including what types of clothing offer the best protection in the real world.

The CDC already recommends permethrin as a tactic to avoid tick bites. He says that people can "treat clothes and equipment, such as boots, pants, socks and tents, with products that contain 0.5 percent permethrin."

The agency also says that "pretreated clothing is available and can be more protective". [19659002] Thomas Mather is director of the Vector-Transmitted Disease Center at the University of Rhode Island and its TickEncounter Resource Center.

He said the new findings, published May 24 in the Journal of Medical Entomology, offer more support for ticking "This can be a very effective way to stop ticks," said Mather, who was not involved in the ticking. the study.

In his own research, Mather discovered that there are benefits even with summer clothes treated with permethrin. that leaves a little bare skin – shorts, t-shirts, socks and sneakers.

His team had a group of brave volunteers watch a movie while allowing ticks raised in the laboratory and free of disease to crawl over their bodies. Some wore normal clothes, some wore clothes with permethrin, either pretreated or with the added insecticide using home kits. Those who wore any type of treated clothing ended up with far fewer live ticks on their bodies at the end of the movie.

While people can use permethrin in their normal clothes, pretreated garments can withstand many more washes, according to Mather. – up to 70.

Some people may be suspicious of chemically treated clothing. But, Mather said, the amount of permethrin in clothing is very low: a solution containing only 0.5 percent of the pesticide is "dried" on the cloth.

According to the US Environmental Protection Agency US, Research indicates that permethrin is "poor" absorbed "through the skin, and there is no evidence that treated clothing can be harmful to children or pregnant women.

the military has been wearing uniforms "According to Mather, garments can also be a good bet for people whose jobs keep them outdoors, or for gardeners or anyone else who spends time in places where the exposure has been treated with permethrin since the 1990s. to ticks is a concern.

Eisen pointed out some others recommended by the CDC ways to reduce the risk of tick-borne diseases: avoid wooded and weedy areas with tall grass and "leaf litter", walk in the middle of trails outdoors, use EPA-registered repellents that contain ingredients such as DEET, picaridin or lemon eucalyptus oil, thoroughly check your body and clothes for ticks s after being outside; and shower within two hours of returning inside.

More information

The CDC has more tips on how to avoid tick bites.

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