Approximately 90% of people are allergic to this substance and develop a rash upon contact. Urushiol is the oily substance in the leaves, stems, and roots of the poison ivy plant. Is poison ivy contagious?Ī poison ivy rash is medically referred to as contact dermatitis because you only get it if you come in contact with the allergen urushiol, says Christopher Bunick, MD, a dermatologist at Yale Medicine. However, you can get a poison ivy rash by touching someone who has just touched the plant or if you happen to come into contact with contaminated objects like gardening tools or gloves. Poison ivy is not considered contagious in the same sense as an infectious disease.
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