Just thinking about poison ivy can make you itch. Blistering rashes on your arms and ankles, oozing bumps between your fingers and eyelid-swelling exposures are all-too-familiar summer hazards.

SHREVEPORT, La. - For many homeowners, battling unwanted plants in the yard is just part of the routine. But one invasive vine can do more than take over flowerbeds — it can cause painful rashes and ...