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Urushiol-induced contact dermatitis (also called Toxicodendron dermatitis or Rhus dermatitis) is a type of allergic contact dermatitis caused by the oil urushiol found in various plants, most notably sumac family species of the genus Toxicodendron: poison ivy, poison oak, poison sumac, and the Chinese lacquer tree. [1]
Toxicodendron radicans, commonly known as eastern poison ivy [3] or poison ivy, is an allergenic flowering plant that occurs in Asia and eastern North America. The species is well known for causing urushiol-induced contact dermatitis , an itchy, irritating, and sometimes painful rash, in most people who touch it.
Urushiol is an oleoresin contained within the sap of poison ivy and related plants, and after injury to the plant, or late in the fall, the sap leaks to the surface of the plant, where under certain temperature and humidity conditions the urushiol becomes a blackish lacquer after being in contact with oxygen.
Contact dermatitis is when a dry, red, scaly rash that can also look like fluid-filled blisters or poison ivy appears from coming in contact with an irritant or allergen, says Dr. Parikh.
What it looks like: Poison ivy is a type of allergic contact dermatitis that is caused by the oil (urushiol oil) in the poison ivy plant, explains Karan Lal, D.O., M.S., F.A.A.D., double board ...
What does poison ivy look like? Poison ivy can grow as a vine or a small shrub, trailing along the ground or even climbing low plants, trees and poles.Look for three glossy leaflets. The common ...
Poison ivy is a type of allergenic plant in the genus Toxicodendron native to Asia and North America. Formerly considered a single species, Toxicodendron radicans , poison ivies are now generally treated as a complex of three separate species: Toxicodendron radicans (photo on the right), Toxicodendron rydbergii , and Toxicodendron orientale .
Learn to recognize wild parsnip, cow parsnip and giant hogweed; these plants can cause painful skin burning, blistering and scarring. Watch out for harmful plants including poison ivy, wild ...