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Question:
An otherwise healthy 10-year-old boy develops blotchy areas of erythema that are pruritic over the skin of his arms, legs, and trunk within an hour every time he eats seafood, followed by diarrhea. These problems abate within a few hours, and physical examination reveals no abnormal findings. Which of the following immunologic mechanisms is at work?
Correct Answer: D. Localized anaphylaxis
This is a classical type I hypersensitivity reaction (food allergy).
Cell mediated hypersensitivity is Type IV.
Hypergammaglobulinemia is plasma cell mediated.
Complement C3B is Type III.
Immune complex deposition is also Type III.
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Category: ImmunologyAn otherwise healthy 10-year-old boy develops blotchy areas of erythema that are pruritic over the skin of his arms, legs, and trunk within an hour every time he eats seafood, followed by diarrhea. These problems abate within a few hours, and physical examination reveals no abnormal findings. Which of the following immunologic mechanisms is at work?
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