What is the Arthus reaction?

Question

Quizplus · Accepted Answer

The Arthus reaction is an acute inflammatory response that occurs following a second injection of vaccines or other antigens at the same site. It results from a deposition of immune complexes and subsequent activation of complement and inflammatory cells.

Answer: A
 The Arthus reaction is also associated with certain autoimmune disorders, particularly those involving antibodies against blood vessels.

Answer: D
 The lysis of red blood cells due to complement activation is not related to the Arthus reaction. This type of reaction is more commonly associated with transfusion reactions or autoimmune hemolytic anemia.

Answer: E
 The formation of wheals (raised, red bumps) during an allergy skin test is not specific to the Arthus reaction. This is a general response of the immune system to the introduction of an allergen into the skin.

Answer: C
 The Arthus reaction is not related to a positive tuberculosis skin test. This is an example of a delayed-type hypersensitivity reaction, which occurs several days after exposure to the antigen.

What Is the Arthus Reaction