Absorbed through the skin. Plants such as poison ivy, sumac and oak and latex are examples. allergy symptoms Anything can be an allergen. Common dust, pollen, plants, medications, certain foods, insect venoms, viruses, or bacteria are examples of allergens. ...
“If you put the chemical on your skin and then brush up against a poison oak leaf, you won’t get a rash.” Eventually, she found that a neutralizer to urushiol — the irritating oil released by poison oak, poison ivy and poison sumac — existed, albeit not in a particularly useful ...