Return to Hardin MD : Poison Ivy Pictures | Hardin MD : Medical Pictures from CDC
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This photograph depicts an individual’s arm with a blistering poison oak rash. Note the linear pattern to the lesions. The Rhus genus of plants include poison ivy, poison oak and poison sumac. When the oil from such plants gets on the skin, it begins to penetrate in minutes. A blistering reaction appears, usually within 12 - 48 hours. Plants, Toxic, Skin and Connective Tissue Diseases Picture & text from CDC/PHIL. For more information see Hardin MD : Medical Pictures from CDC |

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