Sentences with word «pyrethroid»

In the new study, 5,046 urine samples collected from U.S. adults and children between 1999 and 2002 were tested for five metabolites of pyrethroid insecticides.

Regarding Ried Nelson's entry — the combination of pyrethroid insecticides and associated chemical adjuvants like piperonyl butoxide are not entirely harmless, especially to beneficial insects, children, aquatic organisms and cats.

After cleaning, the entire cage should be sprayed with pyrethroid spray.

Up to a half of all sheep farmers in Britain are thought to have switched to dipping their animals in synthetic pyrethroids in the past two years.

In response to toxicity concerns raised by Weston's work, California's Department of Pesticide Regulation began reevaluating regulation of pyrethroids in 2006.

«Although laboratory tests can predict effects in the field, care should be taken when using the lab data for 303 (d) listing if alternative field data indicate that the organisms of concern are not affected by the constituent of concern, such as pyrethroids,» said Stephen Clark, lead author of the Environmental Toxicology and Chemistry study.

Bedbugs have become a big problem in U.S. hotels and homes over the past decade, in part because they are resistant to a widely used class of insecticides called pyrethroids.

Flea shampoos usually contain pyrethrins, while flea tablets and spot - on treatment often contain pyrethroids, or occasionally both.

«They don't tend to think of the suburban homes, whereas it turns out the suburban home was a constant source of pyrethroid toxicity.»

These animal studies are relevant to human health because pyrethroids act on functions of the nervous system common to all animals, according to the EPA.

Study lead author Mojca Kristan from the London School of Hygiene & Tropical Medicine, said: «This is the first time that effects of pyrethroids on the parasite have been observed in a malaria endemic setting, with wild - caught mosquitoes and parasites.

Note: Pyrethroid products should not be applied around fish - containing ponds or streams.

Those products that contain insecticides from the pyrethrin or pyrethroid family are the culprit (e.g, permethrin, cyphenothrin, etc.).

The Center for Public Integrity found that from 2002 through 2007 at least 1,600 pet deaths from pyrethroid spot - on treatments were reported to the EPA.

For pyrethroid paresthesia, applying vitamin E to the affected skin can provide quick relief — just use scissors to snip open a vitamin E capsule (the kind used as a vitamin supplement) and squeeze the oily contents onto the pet's skin and rub it in.

Barr authored a study that for the first time has measured pyrethroid exposure in the U.S. population.

South Africa went back to using DDT, an organochloride, after an epidemic of malaria transmitted by pyrethroid - resistant mosquitoes in 1999 and 2000.

Some countries have switched from pyrethroids to an organophosphate insecticide called actellic.

Resistance involves a cytochrome P450 enzyme CYP9K1 which for the first time a role in pyrethroid resistance is established.

Pyrethroid paresthesia is a syndrome that has been well documented in both humans and animals.

This potent spray even kills bed bugs that are resistant to the strong pesticide pyrethroid, making it as close to the best bed bug killer available as possible.

Although paresthesia may occur with any spot - on product, it is most commonly associated with products containing concentrated pyrethroids such as permethrin, cyphenothrin, and etofenprox.

Pyrethroids also have a trait scientists call excito - repellency: They stimulate mosquitoes to leave the net.

The net combines pyrethroids with a chemical called piperonyl butoxide (PBO).

«The rapid evolution of resistance following the reintroduction of pyrethroid IRS, along with movement of infected people from the mainland highlights the importance of monitoring for changes in vector populations.

The study is the first making the connection between pyrethroid exposure and genetic risk for Parkinson's, and thus needs follow - up investigation, says co-senior author Malu Tansey, PhD, associate professor of physiology at Emory University School of Medicine.

Studies with lab animals have linked pyrethroid exposure to damage of the thyroid, liver and nervous system, as well as impairment of behavioral development, changes in the immune system and disruption of reproductive hormones, according to the 2006 EPA review.

Active ingredients including pyrethrins and pyrethroids control ticks, fleas, lice, mites, and mosquitos.

Traces of at least one pyrethroid metabolite were found in 75 percent of the people tested in 2001 - 2002, up from 66 percent in 1999 - 2000.

A natural option that works on even pyrethroid - resistant bed bugs, Proof kills through both direct and indirect contact and provides pest control for weeks after initial application.

«As a bonus,» Knols says, «fungal infection makes insects that resist pyrethroids susceptible again.»

To evaluate the efficacy of indoor residual spraying against malaria, scientists place a piece of tape on the wall, pull it off, and then soak it in a chemical solution to see how much pyrethroid insecticide was applied.

Any insecticide used in a bed net «has to be safe enough that a child can put it in their mouth,» says Ranson, and only pyrethroids fit the bill.

Potential outcomes include banning pyrethroids in certain areas, tightening policies or no change to the regulations.

For the first time ever, Weston and his team documented pyrethroids in the outflow of sewage treatment plants, which was surprising.

Also, an insecticide called fipronil has partially replaced pyrethroids for controlling termite and ant infestations in some areas.

Also, the EPA this year is reevaluating pyrethroids as part of its 2010 pesticide review.

But evidence is mounting that the switch to less - toxic pyrethroids has brought its own set of new ecological and human health risks.

«Most people wouldn't have expected pyrethroids to get through the system.

Consumers can identify pyrethroids in products by checking labels for compounds that end in «thrin,» such as bifenthrin, permethrin and cypermethrin.

«Pyrethroids tend to accumulate in dust or on surface areas in homes because they don't evaporate easily into the air.»

«Now that we know people are exposed to pyrethroids widely, we need to determine what the exact health effects are,» said Barr.

A 2008 study found pyrethroids and their metabolites in vacuum cleaner dust collected from homes and daycare centers in North Carolina and Ohio.

Because pyrethroids pose little threat to people, says Morrison, farmers get the impression that they are safe.

«It seems that only with their use as sheep dip have pyrethroids begun to reach the aquatic environment,» says Prigg.

Neither the SEPA nor the Environment Agency, which covers England and Wales, has collated data on the number of cases of pyrethroid pollution.

The field studies verified what the scientists found in their lab tests: local Aedes aegypti have developed resistance to most pyrethroids, but organophosphate insecticides offer effective control.

They have also shown that this gene makes insects resistant to pyrethroids raising the concern that GSTe2 gene could protect mosquitoes against the major insecticides used in public health.

They also introduced the gene into fruit flies (Drosophila melanogaster) and found they became resistant to DDT and pyrethroids compared to controls, confirming that just this single mutation is enough to make mosquitoes resistant to both DDT and permethrin.