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Question:
A 17 year-old male is hiking through the foothills of West Virginia. Two days after his hike, he notices a large, inflamed region on his left calf characterized by redness, itching, and a rash. What type of hypersensitivity reaction is the young man experiencing?
Correct Answer: D. Type IV delayed-type
The symptoms described are characteristic of poison ivy contact dermatitis. This is a Type IV Delayed-Type Hypersensitivity (DTH). It is mediated by sensitized T-cells that release cytokines when encountering the antigen.
When generally thinking about poison ivy and delayed type hypersensitivity (type IV) the rash would show up a few days later.
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Category: PharmacologyA 17 year-old male is hiking through the foothills of West Virginia. Two days after his hike, he notices a large, inflamed region on his left calf characterized by redness, itching, and a rash. What type of hypersensitivity reaction is the young man experiencing?
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