A 30-year-old male is having difficulty breathing and has been spitting blood. He reports that he began experiencing this reaction after cleaning his pigeons' cages
Testing reveals he is suffering from allergic alveolitis. Which of the following is he experiencing?
a. Serum sickness
b. Raynaud phenomenon
c. Antibody-dependent cytotoxicity
d. Arthus reaction
ANS: D
The Arthus reaction is a model of localized or cutaneous reactions. Serum sickness-type reactions are caused by the formation of immune complexes in the blood and their subsequent generalized deposition in target tissues. Typically affected tissues are the blood vessels, joints, and kidneys. Raynaud phenomenon is a condition caused by the temperature-dependent deposition of immune complexes in the capillary beds of the peripheral circulation. Antibody-dependent cytotoxicity is a type II form.
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