There are only three places in North America (excepting the polar region) that poison ivy is not found – the West Coast of the U.S., Nevada and Hawaii.
Everywhere (and everyone) else is fair game for the poison ivy, and the chances are that you have had some unpleasant experience with the plant (over 50% of the population are allergic to it).
There are actually two species of poison ivy prevalent in North America: Eastern Poison Ivy (Toxicodendron radicans) and
“Western” poison ivy (Toxicodendron rydobergii).
While radicans is found in the eastern portion of the continent (including Texas and Arizona), western poison ivy is found mainly on the eastern slopes of, throughout the Rocky Mountains below 8,500 feet, and west of the Rocky Mountains.
Both species produce a resin, called unushiol, which causes an allergic reaction, mostly in the form of intense itching and a blistering rash.
Unushiol is also found in cashew, mango and gingko trees.
One does not have to touch poison ivy to be affected by it. Standing downwind from poison ivy being burned can also have an allergic reaction.
Treatment
Although there are a great many folk remedies for treating the allergic reaction to poison ivy, none have been proven to be medically reliable.
Some people recommend oral antihistamines. These may relieve some of the symptoms, such as itching. But often, the only result is sleepiness.
Over-the-counter cortisone creams have also been used, but reports indicate varying results. Cortisone cream may be best used before the blisters appear, or after they have dried up.
Finally, oral steroids, such as prednisone, have been recommended as treatment.
The best treatment
The very best treatment for poison ivy is to avoid it. If that is not possible, then wear long-sleeved shirts, heavy gloves (preferably rubber ones that can be washed), long trousers, socks, and face protection.
If you do contract poison ivy rash, then see your physician. He or she can prescribe the best treatment for you.
Related Topics:
