Repellent Treated Clothing : The Agent Of Choice For These Products
Permethrin is the agent of choice for these products. This is a man-made synthetic pyrethroid, a class of insecticides derived from Chrysanthemum cinerariifolium. Arthropod toxicity is exerted by sodium channel antagonism with, interestingly, strength of effect inversely correlated with temperature. Cold-blooded animals, in general, and fish, in particular, are unusually sensitive to these effects, while humans exposure is generally considered safe. Exposed mosquitoes are either killed or experience “knock down” (falling from the air) when exposed to these products. Primarily comes in two forms: 1) SPRAYS that can be applied to any fabric; 2) IMPREGNATED CLOTHING products that are listed as toxicity category IV by the EPA. Dermal absorption by mammals is low and it is rapidly metabolized by ester hydrolysis. There are no special warnings for use during pregnancy or by children. When used correctly and in combination with DEET-containing products for exposed skin, permethrin allows for added protection far beyond what is achieved with DEET alone.
Wall- or battery-powered devices that release vaporized pyrethrins or pyrethroids, aerosolizers will likely clear a room within 30 minutes and remain effective for up to 6 hours. There is weak evidence that aerosolized/vaporized preparations of pyrethroids/pyrethrins may represent slightly elevated risks of human harm. Specifically, analysis from animal studies of these vapors suggest that…