Poison ivy is a plant that causes an allergic reaction in the form of a red, itchy rash when touched by skin. It is found throughout most of the United States except for in the Southwest, Alaska and Hawaii. More »

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Dogs do not have a reaction to poison ivy or similar plants such as poison oak and poison sumac. However, they can spread poison ivy to any humans who handle them, so they should be washed after exposure. More »

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A poison ivy rash is not contagious and coming into contact with a blister or its fluid content will not transmit the rash to another person. What causes the rash is the oil called urushiol. Plants such as poison ivy, su... More »

Poison ivy is a green plant that has a shiny reddish tinge in the spring and always has three leaflets. The leaves are usually anywhere from 2 to 6 inches long and can have smooth or toothed edges. More »

Poison ivy has compound leaves formed from groups of three leaflets. Individual plants have different numbers of total leaves based on the plant's size and age, but the individual leaves always consist of groups of three... More »

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Common symptoms of poison oak and poison ivy include itching, red streaks or general redness where skin contact was made with the plant, hives in the form of small bumps or large raised areas, and blisters that may leak ... More »

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The primary way to distinguish between poison oak and poison ivy is by where the plant grows. Poison oak generally grows along the West Coast of the United States, while poison ivy grows in the remainder of the states, a... More »