Poison-Ivy-NYC-(212)-644-9494-NYC-Poison-Ivy - New York, NY

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Poison Ivy

1. Where is poison ivy, poison oak and poison sumac found?
Poison ivy, poison oak and poison sumac grow practically everywhere in the United States, except Hawaii, Alaska and some desert areas of Nevada. They are the most common causes of allergic reactions in the United States.

2. What causes the poison ivy rash?
Poison ivy rash is really an allergic contact dermatitis caused by a substance called urushiol, found in the sap of poison ivy, poison oak and poison sumac. Urushiol is a colorless or slightly yellow oil that oozes from any cut, or crushed part of the plant, including the stem and the leaves. You may develop a rash without ever coming into contact with poison ivy, because the urushiol is so easily spread. Sticky, and virtually invisible, it can be carried on the fur of animals, on garden tools, or on any objects that have come into contact with a crushed or broken plant. After exposure to air, urushiol turns brownish-black, making it easier to spot. Once it touches the skin, the urushiol begins to penetrate in a matter of minutes. It can be neutralized to an inactive state by water.
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