A patient develops hives and wheezing minutes after a bee sting. Which hypersensitivity type is this?

Answer and explanation

Correct answer: A. Type I

  1. Step 1: IgE bound to mast cells causes immediate reactions. Answer: Type I. Why not the others: Type II, Type III and Type IV don't fit.

Practise more Microbiology and Immunology.

Free questions with an explanation for every one, and full timed USMLE Step 1 mock tests.