An uncommon skin disease caused by a hypersensitivity reaction, as occurs in hikers and backpackers following contact with poison ivy or poison oak.
(al LUR jik CON tack DUR muh TIE tis): The form of contact dermatitis that is a delayed allergic reaction to an allergen. Characterized by inflammatory papules and vesicles. Poison ivy is a form of allergic contact dermatitis.
Delayed or type IV immunologic contact dermatitis, similar to poison ivy dermatitis. This allergic reaction is usually due to the chemicals in latex gloves. These reactions develop slowly, usually appearing in 18 - 24 hours, peaking at 48 hours, and resolving in 72 - 96 hours. It is the second most common skin reaction.