-- Robert Preidt
WEDNESDAY, Oct. 19 (HealthDay News) -- Some of the genetic
traits that give bedbugs resistance to insecticides have been
pinpointed by U.S. researchers.
The findings will help efforts to understand the biochemical
basis for bedbug resistance to insecticides and provide molecular
markers for surveillance.
"Different bedbug populations within the U.S. and throughout the world may differ in their levels of resistance and resistance strategies, so there is the need for continuous surveillance," study author Zach Adelman, an associate professor of entomology with the Vector-Borne Disease Research Group at Virginia Tech, said in a school news release.
There's been a resurgence of bedbugs in the United States in the
past decade, and some bedbugs have developed a resistance to
pyrethroids, one of the few classes of insecticides used to control
The Virginia Tech team identified three genes (cytochrome P450
monooxygenases, carboxylesterases and glutathione S-transferases)
that produce enzymes that can bind to, deactivate and break down
two of the most common pyrethroids, deltamethrin and
The researchers also discovered that insecticide-resistant
bedbugs have a mutation in the sodium channel gene. This mutation
gives the bedbugs partial resistance to pyrethroid
Highly resistant bedbug populations can have a number of genetic
traits that protect them against pyrethroids and possibly other
insecticides, the researchers concluded.
The study appears in the Oct. 19 issue of
The U.S. Centers for Disease Control and Prevention has more
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