Scratching Out Poison Ivy Allergy
Scientists Try to Make the Body Immune to Poison Ivy
WebMD News Archive
Nov. 14, 2006 -- Plagued by poison ivy allergy? It might be possible to coax
the body to build up immunity to poison ivy.
That news comes from researchers including Mary Morris, MD, of Allergy
Associates of La Crosse in La Crosse, Wis.
They studied 115 people with a history of severe skin reactions to poison
ivy who were treated at their clinic over the past 15 years.
The treatment was a small amount of poison ivy extract placed under the
tongue. The goal was to train the body's immune system not to overreact to
The patients took skin tests to see if the treatment helped.
Those tests showed that after treatment, patients had a much higher
threshold for allergic skin reactions to poison ivy.
Ninety percent of the patients said they had "far fewer" skin
reaction episodes. Patients who said they still got skin rashes reported milder rashes that were quicker
to heal than before treatment.
Further tests are needed. If those tests go well, the treatment may help
people whose jobs and hobbies expose them to poison ivy, the researchers
The findings were presented in Philadelphia at the American College of
Allergy, Asthma, and Immunology's annual scientific meeting.