For each of the clinical scenarios in questions ,choose the hypersensitivity type (A-D)that best matches the associated immunologic disease.(Answers may be used more than once. )
-A 23-year-old medical student is taken to the emergency department because of diffuse facial erythema (redness),tightness of the chest,and difficulty breathing.He reports that the symptoms began shortly after he ate a shellfish dinner at a nearby Thai restaurant.On physical examination,he appears to be in acute distress with elevated heart rate and respiratory rate and a dangerously low blood pressure.He is treated with epinephrine.
A)Type I hypersensitivity
B)Type II hypersensitivity
C)Type III hypersensitivity
D)Type IV hypersensitivity

Question

Quizplus · Accepted Answer

This young man is in anaphylactic shock,secondary to systemic exposure to shellfish antigens,to which he produced IgE antibodies when he was previously exposed.This is a classic example of type I (immediate)hypersensitivity.

For Each of the Clinical Scenarios in Questions ,Choose the Hypersensitivity