The poison ivy contains an oily resin or sap in all parts of the plant that can cause an allergic reaction in most people ...

Poison ivy oil can spread quickly and easily (just like poison oak does). Poison ivy rash can spread from clothes, skin ...

Source: Focus Medica. A condition in which skin rashes develop on the body when contacted with a plant called poison ivy. Caused by the sap of plants containing irritant called urushiol.