Story highlights A study reveals that bedbugs have developed a thicker skin to survive exposure to commonly used bug spray

These findings could help in developing more effective insecticides for bed bug control

(CNN) Remember when you were tucked into bed as a kid and told not to let the bedbugs bite? That just got a lot harder to do.

new study reveals that bedbugs have developed a thicker skin that enables them to survive exposure to commonly used bug sprays, according to University of Sydney research published in the scientific journal PLOS ONE.

Bedbugs are bloodsucking parasites. Unfortunately for us, their meal of choice is human blood. There has been a global resurgence of bedbugs in the past few decades, because trying to kill the bugs has only made them stronger, according to the new study and other previous research.

If you're thinking of escaping a bedbug infestation at home, a hotel bed might not be a much better option. The parasites have caused significant financial headaches for the tourism and hospitality industries. Professional extermination of bedbugs typically costs $200 to $1,500 per room and often fails.

The Australian study, which was funded in part by Bayer Crop Science, which makes products that kill bedbugs, found that the thicker the insect's natural covering, the more likely the bedbugs were to survive exposure to the insecticides.

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