Which matches the correct hypersensitivity reaction with its type?
A) immediate (type I) - immune complexes
B) cytotoxic (type II) -- anaphylaxis
C) immune complex (type III) - precipitation of antigen-antibody complexes
D) cell-mediated (type IX) - blood transfusion

Question

Quizplus · Accepted Answer

Immune complex (type III) reactions involve the formation of antigen-antibody complexes that then deposit in tissues, leading to a local inflammatory response and tissue damage. Precipitation of these complexes can occur, leading to inflammation and tissue damage.

Answer: B
 Cytotoxic (type II) reactions involve antibodies binding to cell surface antigens, leading to activation of complement and destruction of the affected cells. Anaphylaxis is a severe, life-threatening form of immediate (type I) hypersensitivity reaction.

Which Matches the Correct Hypersensitivity Reaction with Its Type