An Arthus reaction is a _____.
A)local reaction at the site of injection with edema and hemorrhage
B)systemic reaction in which immune complexes increase activating complement
C)deposition of antibody and interleukin on the membrane of epithelial tissues
D)local reaction in a large mass of cells which leads to granuloma formation

Question

Quizplus · Accepted Answer

The Arthus reaction is a type of local immune complex-mediated hypersensitivity reaction. It occurs at the site of injection of an antigen into a previously sensitized individual, leading to local inflammation characterized by edema and hemorrhage. This reaction is due to the formation of antigen-antibody complexes in the presence of pre-existing antibodies, which then activate complement and attract inflammatory cells, causing tissue damage.

An Arthus Reaction Is a _____